Synthesis and Structure of Trimethylplatinum(IV) Iodide Complex of 4'-(4-Methoxyphenyl)-2,2':6',2''-terpyridine Ligand and its Halogen Bonding Property

Article abstract of DOI:10.1002/zaac.201900201

The synthesis and structural characterization of a new trimethylplatinum(IV) iodide complex of 4'-(4-methoxyphenyl)-2,2':6',2''-terpyridine ligand L, {PtMe₃IL} (1) is reported. The X-ray crystal structure shows that the terpyridine ligand L bin

Full text of DOI:10.1002/zaac.201900201

Journal of Inorganic and General Chemistry
DOI: 10.1002/zaac.201900201
ARTICLE
Zeitschrift für anorganische und allgemeine Chemie
Synthesis and Structure of Trimethylplatinum(IV) Iodide Complex
of 4Ј-(4-Methoxyphenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine Ligand and its
Halogen Bonding Property
Dipankar Das,[a] Sourav Sutradhar,[a] Kari Rissanen,[b] and Biswa Nath Ghosh*[a,b]
Abstract. The synthesis and structural characterization of a new tri-
methylplatinum(IV) iodide complex of 4Ј-(4-methoxyphenyl)- plex 1a (1·DITFB). The structural investigation shows that 1a exhibits
,2Ј:6Ј,2ЈЈ-terpyridine ligand L, {PtMe IL} (1) is reported. The X-ray the halogen bonding interaction in which the non-coordinated pyridyl
crystal structure shows that the terpyridine ligand L binds the plati- nitrogen acts as halogen bond acceptors by forming I···N interaction
num(IV) metal center in bidentate fashion, which is well supported by with iodine atom of DITFB. In addition iodine atom of complex 1 also
1,4-diiodotetrafluorobenzene (DITFB) forms the halogen bonded com-
2
3
1
the H NMR spectrum of 1. The complex 1 upon crystallization with
acts as weak halogen bond acceptor.
Introduction
methyl groups and an iodine atom. Furthermore, 1 upon
crystallization with 1,4-diiodotetrafluorobenzene (DITFB)
forms the halogen bonded complex 1a. The structural investi-
gation shows that 1a exhibits the halogen bonding interaction
in which the non-coordinated pyridyl nitrogen acts as halogen
bond acceptors by forming I···N interaction with iodine atom
of DITFB. In addition iodine atom of complex 1 also acts as
weak halogen bond acceptor.
During the last two decades, the chemistry of halogen bond,
alternative to hydrogen bond, represents an emerging area of
research. It is termed as a non-covalent attractive interaction
involving a nucleophile (halogen bond acceptor) and an elec-
trophile containing halogen atom (halogen bond donor). The
halogen bond found applications in diverse areas such as
[
1]
crystal engineering, liquid crystal, luminescence, dye sensi-
tized solar cell, etc.[
2–10]
Considering the importance, several
Experimental Section
nitrogen based ligands have been used as halogen bond ac-
ceptors.[
2,5,10–13]
Among the nitrogen based ligands, General Methods and Materials: Trimethylplatinum(IV) iodide was
,2Ј:6Ј,2ЈЈ-terpyridines and 2,2Ј-bipyridines and their transi- purchased from Strem Chemicals. All other chemicals and solvents
2
tion metal complexes possess interesting photophysical and were of analytical reagent grade, purchased commercially, and used
as received. The ligand 4Ј-(4-methoxyphenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine L
electrochemical properties and used in self-assembled hydro-
[
29]
was synthesized following a literature procedure,
whereas complex
gelation, luminescent chemosensors, mixed-valence chemistry,
[
28]
1
etc.[14–20]
1 was synthesized according to the literature method.
The H and
In particular, the study of platinum(IV) complexes
1
3
C NMR spectra were recorded on Bruker Avance DRX 400 and DRX
00 MHz spectrometer. The mass spectra were measured on a QSTAR
of nitrogen ligands attracts considerable attention due to their
5
intriguing dynamic behavior in solution and their involvement
Elite ESI-Q-TOF mass spectrometer equipped with an API 200 Turbo
Ion Spray ESI source from AB Sciex (former MDS Sciex). Elemental
analyses were performed with an Elementar Analysesysteme GmbH
in Shilov-type chemistry.[
2
21–27]
Platinum(IV) complexes of
,2Ј:6Ј,2ЈЈ-terpyridines also act as halogen bond acceptors.[28]
Herein we reported the synthesis and structural characteriza- VariolEL.
tion of a new trimethylplatinum(IV) iodide complex of 4Ј-(4-
Synthesis of 4Ј-(4-Methoxyphenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine (L): 2-
Acetylpyridine (4.84 g, 40 mmol) was added to a solution of 4-meth-
oxybenzaldehyde (2.72 g, 20 mmol) in methanol (100 mL). KOH pel-
methoxyphenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine ligand L, {PtMe IL}
3
(1). The X-ray crystal structure shows that the terpyridine li-
gand L binds the platinum(IV) metal center in bidentate fash-
3
lets (3.4 g, 85%) and aq. NH (60 mL) were added to the stirred solu-
ion which is in distorted octahedron environment with three tion and the resulting mixture was refluxed for 36 hours. The precipi-
tate was then filtered, washed several times with methanol
*
B. N. Ghosh
(4ϫ25 mL). The solid residue was then dissolved in dichloromethane
15 mL) and excess n-hexane added (60 mL). The resultant solid was
filtered, washed with n-hexane (3 ϫ10 mL) and dried in air. Yield
E-Mail: b.chem06@gmail.com
(
[
[
a] Department of Chemistry
National Institute of Technology Silchar
Silchar, Cachar 788010, Assam, India
b] Department of Chemistry
Nanoscience Center
1
35%. H NMR (400 MHz, CDCl
3
, 25 °C): δ = 8.7 (m, 4 H), 8.6 (d, 2
H, J = 8.0 Hz), 7.8 (m, 4 H), 7.3 (m, 2 H), 7.0 (d, 2 H, J = 8.7 Hz),
13
3
.9 (s, 3 H) ppm. C NMR (100 MHz, CDCl
3
, 25 °C): δ = 160.7,
University of Jyväskylä
1
56.5, 156.0, 150.0, 149.2, 137.0, 130.9, 128.7, 123.9, 121.5, 118.5,
P.O. Box 35
+
114.5, 55.6 ppm. MS: m/z = 362.1237 ([M + Na] , calcd. 362.1264).
40014 Jyväskylä, Finland
Supporting information for this article is available on the WWW
under http://dx.doi.org/10.1002/zaac.201900201 or from the au-
thor.
Synthesis of Complex [PtMe IL] (1): To a chloroform solution
(4 mL) of trimethylplatinum(IV) iodide (150 mg, 0.41 mmol),
3
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139.0 mg (0.41 mmol) of L in chloroform (6 mL) was added and the
Table 1. Crystallographic data for the complex 1 and its halogen
reaction mixture was stirred at 50 °C for 12 h. The mixture was then
concentrated after which an excess of n-hexane (30 mL) was added
slowly. The resultant pale-yellow solid complex 1, was filtered,
washed with n-hexane, and dried in vacuo. Yield 84%. Diffusing n-
bonded complex 1a.
1
1a
Empirical formula
C
25
H26IN
3
OPt
30.5 4 3 3
C H24.5Cl0.5F I N OPt
1118.55
123.01(10)
0.71073
M
w
/g
706.48
173(2)
0.71073
hexane into its chloroform solution at room temperature afforded pale-
1
T /K
λ /Å
yellow crystals of 1. H NMR (500 MHz, CDCl
3
, –50 °C): δ = 9.1 (d,
1
1
7
7
7
7
H, J 5.2 Hz), 8.8 (d, 1H, J = 7.8 Hz), 8.7 (d, 1H, J = 4.4 Hz), 8.4 (d,
H, J = 8.1 Hz), 8.3 (br. s, 1H), 8.1 (m, 2H), 7.9 (td, 1H, J = 1.0,
.7 Hz), 7.8 (d, 2H, J = 8.7 Hz), 7.6 (t, 1H, J = 6.0 Hz), 7.5 (m, 1H),
Crystal color, shape pale-yellow, block yellow, needle
3
Crystal size /mm
0.38ϫ0.25ϫ0.10 0.25ϫ0.16ϫ0.07
triclinic
P1
Crystal system
Space group
a /Å
b /Å
c /Å
triclinic
2
.0 (d, 2H, J = 8.7 Hz), 3.9 (s, 3H, –OMe), 1.6 (s, 3H, Me, JPt–H
:
:
¯
¯
P1
3.3 Hz), 0.4 (s, 3H, Me, 2
0.3 Hz) ppm. MS: m/z = 579.1743 ([PtMe
J
Pt–H: 72.1 Hz), 0.3 (s, 3H, Me, J
Pt–H
2
8.7230(3)
9.3072(3)
15.2454(9)
91.408(4)
98.703(3)
102.898(3)
1190.41(9)
2
1.971
7.212
672
2.25 to 25.00
8.4383(2)
13.5776(5)
15.9896(6)
114.7780(10)
99.276(2)
95.599(2)
1613.44(9)
2
2.302
7.313
1036
2.488 to 24.997
99.2%
+
3
(L)] , calcd. 579.1720).
H26IN OPt (706,48 g·mol ): C 42.50; H 3.71; N
3
–1
Anal. calcd. for C25
α /°
β /°
5.95%; found: C 42.45, H 3.75, N 5.83%.
γ /°
V /Å
Crystallization of Halogen Bonded Complex 1a: 1,4-Diiodo-
tetrafluorobenzene DITFB (25 mg, 0.063 mmol) was added to the solu-
tion of complex 1 (11 mg, 0.016 mmol) in chloroform (4 mL). The
slow diffusion of n-hexane into the resulting solution at room tempera-
ture afforded deep-yellow crystals of XB complex 1a (1·DITFB). Anal.
3
Z
–
3
ρ
c
/g·cm
–1
μ /mm
F(000)
θ range /°
–1
Calcd. for C31
26 4 3 3
H F I N OPt (1108.36 g·mol ): C 33.59; H 2.36; N
3.79%; found: C 33.36, H 2.19, N 3.58%.
Completeness to θfull 99.9%
Reflections collected 7500
9238
X-ray Crystallographic Studies: Diffraction data for 1 was collected Independent reflec-
using Agilent Supernova single source diffractometer (with Mo-K ra-
tions
4192 [R(int) =
0.0240]
5620 [R(int) = 0.0261]
5620 / 0 / 395
1.189
α
diation; λ = 0.71073 Å) equipped with an Atlas detector. Data acqui-
Data / restraints / pa- 4192 / 0 / 284
rameters
sition, reduction and analytical face-index based absorption correction
[
30]
Goodness-of-fit on
1.081
for all these complexes were made using program CrysAlisPro.
X-
2
F
ray diffraction data for single crystal of 1a was collected using a
Bruker-Nonius Kappa CCD diffractometer equipped with an APEX
Final R indices
R
1
= 0.0251, wR
0.0581
= 0.0280, wR
.0606
0.647 and –0.934
2
=
=
R
1
= 0.0327, wR
0.0735
= 0.0354, wR
0.0750
2.578 and –1.816
2
=
=
[
I Ͼ 2σ(I)]
II detector with graphite-monochromatized Mo-K
α
(λ = 0.71073 Å)
R indices (all data)
R
1
2
R
1
2
[
31]
radiation at 123 K. Collect software was used for data collection
0
[
32]
and DENZO-SMN for its processing.
Absorption correction was Largest diff. peak
[
33]
–3
applied with the multi-scan SADABS program. The structures were
and hole /e·Å
[
34]
solved with the program Superflip
and refined by full-matrix least-
software equipped with SHELXL-
Anisotropical displacement parameters were intro-
2
[35]
squares on F using the WinGX
2
015 program.[
36]
crystal X-ray diffraction study. The electrospray ionization
duced for all atoms except hydrogen atoms which were calculated into mass spectrometry (ESI-MS) analysis of 1 showed the pres-
+
their ideal positions using isotropic displacement parameters 1.2–1.5 ence of [PtMe L] , generated due to the loss o iodide. In ad-
3
[
37]
times of the host atom. The figures were made using Mercury
pro-
dition, the isotope patterns consistent with those calculated for
the formulated species (Figure 1).
gram. X-ray crystallographic data and structural refinement parameters
for the complexes are reported in Table 1.
Crystallographic data (excluding structure factors) for the structures in
this paper have been deposited with the Cambridge Crystallographic
Data Centre, CCDC, 12 Union Road, Cambridge CB21EZ, UK. Copies
of the data can be obtained free of charge on quoting the depository
numbers CCDC-1947524 and CCDC-1947525. (Fax: +44-1223-336-
033; E-Mail: deposit@ccdc.cam.ac.uk, http://www.ccdc.cam.ac.uk)
Supporting Information (see footnote on the first page of this article):
NMR Spectra of ligand 4Ј-(4-methoxyphenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine
L and mass spectrum of complex 1 given in supporting information.
Scheme 1. Synthesis of complex 1.
Results and Discussion
The trimethylplatinum(IV) complex 1 was synthesized by
the reaction between trimethylplatinum(IV) iodide and terpyri-
dine ligand 4Ј-(4-methoxyphenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine L in
1H NMR Spectroscopy
chloroform in equimolar ratio (Scheme 1 and Experimental
The 1H NMR spectrum of complex 1 was measured in
1
1
Section). Complex 1 was characterized by H NMR spec- CDCl at low temperature (–50 °C) as room temperature H
3
1
troscopy, ESI-Mass spectroscopy, CHN analysis, and single NMR spectrum showed severe broadening. The H NMR spec-
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num metal center in bidentate fashion, which is further con-
firmed by the presence of ten signals for the hydrogen nuclei
of terpyridine core.
X-ray Crystallographic Study
X-ray Structure of Complex 1
In order to firmly establish the bidentate binding nature of
the terpyridine ligand L in the complex 1, crystallization of
the complex 1 was carried out. The Pale-yellow colored single
crystals of 1 were obtained by diffusing n-hexane into its chlo-
roform solution at room temperature. The complex 1 crys-
¯
tallizes in triclinic P1 space group. The crystal structure shows
that the platinum metal center is in a distorted octahedral coor-
dination environment with three methyl groups in fac geome-
try, two nitrogen atoms from the pyridyl groups of the terpyrid-
ine ligand and an iodine atom (Figure 3). Similar coordination
geometry of the platinum metal core has also been observed
Figure 1. ESI-Q-TOF mass spectrum of complex 1, showing experi-
IV
mental (solid line) and theoretical (dotted line) isotopic distributions in previously reported bidentate Pt -terpyridine com-
plexes.[
The deviation from ideal octahedral arrangement mostly
trum of 1 is closely analogous to the spectra of reported Pt - originates from geometric constrains imposed by the con-
17,28,38]
of platinum metal.
IV
terpyridine complexes.[
17,28,38]
The presence of three platinum- strained bite angle of the terpyridine ligands in the complex
methyl signals with satellites, due to Pt-H scalar coupling, [N1–Pt1–N2 angle is 75.9(2)° (caption in Figure 3). The Pt–N
revealed the presence of three non-equivalent methyl groups bond length to the central pyridine ring [2.263(3) Å] is signifi-
1
95
(
two equatorial methyl groups designated as Me and Me and cantly longer than the corresponding Pt–N bond involving ter-
A B
one axial methyl group Me ) in complex 1 (Figure 2). The minal pyridine ring (2.137(4) Å]. The Pt–N bond lengths in
C
above observation gives an indication that L binds the plati- complex 1 are found to be similar to the Pt–N bond lengths
1
at –50 °C. Inset showing the satellite signals (due to 195Pt-H coupling) for the
Figure 2. 500 MHz H NMR spectrum of complex 1 in CDCl
3
methyl groups. For labeling, see Scheme 1.
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Figure 3. Molecular structure of complex 1. Thermal ellipsoids are
drawn at the 50% probability level. Selected bond lengths and angles:
Pt1–N1 = 2.137(4) Å, Pt1–N2 = 2.263(3) Å, Pt1–I1 = 2.7957(4) Å,
Pt1–C1 = 2.058(5) Å, Pt1–C2 = 2.049(4) Å, Pt1–C3 = 2.090(5) Å, N1–
Pt1–N2 = 75.9(2)°, C1–Pt1–N1 = 178.2(2)°, C2–Pt1–N2 = 171.9(2)°,
C3–Pt1–I1 = 177.7(2)°, C1–Pt1–N2 = 103.3(2)°.
Figure 4. Molecular structure of complex 1a (1·DITFB). Thermal el-
lipsoids are drawn at the 50% probability level. XB interaction be-
tween N3 and I2 is shown in dotted bond (indigo color). Selected bond
lengths and angles: Pt1–N1 = 2.168(5) Å, Pt1–N2 = 2.247(5) Å, Pt1–
I1 = 2.7651(5) Å, Pt1–C1 = 2.057(7) Å, Pt1–C2 = 2.040(7) Å, Pt1–C3
=
2.07(4) Å, N1–Pt1–N2 = 75.6(2)°, C1–Pt1–N1 = 177.9(2)°, C2–Pt1–
found in PtMe IL complexes [2.143(3) and 2.250(4) Å, when
3
N2 = 172.8(3)°, C3–Pt1–I1 = 176.6(2)°, C1–Pt1–N2 = 102.3(2)°.
I2···N3 = 2.866(6) Å.
L is 4Ј-(4-cyanophenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine;[
28]
2.145(3)
and 2.263(4) when L is 4Ј-(4-tolyl)-2,2Ј:6Ј,2ЈЈ-terpyridine].[
28]
Like Pt–N bond lengths, the N–Pt–N bond angles also follows
the similar trend: 75.8(2)° in PtMe IL [L is 4Ј-(4-cya-
3
nophenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine], and 75.4(2)° in PtMe IL iodine atom of DITFB and non-coordinated pyridine N atom
3
where L is 4Ј-(4-tolyl)-2,2Ј:6Ј,2ЈЈ-terpyridine. All other bond of terpyridine moiety was found to be 0.83 [I···N distance
lengths and angles of 1 are analogous to that of previously 2.934(5) Å and C–I···N angle 172.7(2)°] in the XB complex
IV
[17,28,38]
reported Pt -terpyridine complexes.
The structural 2PtMe IL·DITFB·2CHCl , where L is 4Ј-chloro-2,2Ј:6Ј,2ЈЈ-
3 3
study also showed that the pyridyl groups are having cis,trans terpyridine,[ whereas RXB value for similar I···N interaction
28]
configuration in 1. Similar feature is also observed in reported found to be 0.81 [I···N distance 2.848(6) Å and C–I···N angle
bidentate metal-terpyridine complexes.[
17,28,38–41]
176.5(3)°] in PtMe IL·2IPFB (L is 4Ј-chloro-2,2Ј:6Ј,2ЈЈ-terpyr-
3
idine), 0.82 [I···N distance 2.886(7) Å and C–I···N angle
1
2
76.4(2)°] in PtMe IL·IPFB [L is 4Ј-(4-cyanophenyl)-
3
Halogen Bonded Complexes 1a
,2Ј:6Ј,2ЈЈ-terpyridine], and 0.79 in PtMe IL·2IPFB [L is 4Ј-
3
The yellow colored crystals of the XB complex 1a were (4-tolyl)-2,2Ј:6Ј,2ЈЈ-terpyridine with I···N distance 2.785(9) Å
obtained by slow diffusion of n-hexane into a mixture of an and C–I···N angle 175.4(3)°].[ The above data of RXB indi-
excess of 1,4-diiodotetrafluorobenzene DITFB and plati- cates relatively strong XB acceptor character of the non-
num(IV) complex 1 in chloroform at room temperature. The coordinated pyridyl group; however, the observed RXB value
complex 1a crystallizes in the triclinic P-1 space group. The in complex 1a is higher in comparison to the RXB value found
28]
crystal structure of 1a is shown in Figure 4. The crystal struc- in
N,N-dimethylpyridin-4-amine-1-fluoro-4-(iodoethynyl)-
ture shows that the asymmetric unit of 1a contains a molecule benzene (RXB = 0.74),[ in which pyridyl nitrogen atoms in-
12]
of 1 along with DITFB. Like complex 1, in complex 1a, the volved in halogen bonding with C–I type donors, iodosacchar-
platinum metal center is also coordinated by three methyl ine and iodosuccinimide (RXB = 0.65).[
13]
In addition,
groups, two nitrogen atoms of the terpyridine ligand L and an platinum(IV) bound iodine atom also involved in weaker XB
iodine atom. It is to be noted that that coordination sphere of interaction with iodine atom of DITFB (I1···I2 distance
platinum(IV) is also occupied by small amount of chlorine 3.5009(8) Å with RXB 0.88). The above data clearly indicates
atom. The presence of chlorine atom could be due to the trace weak XB acceptor character of the platinum(IV) bound iodine
amount of HCl molecule present in CHCl which is used as atom (Figure 5). Similar type of Pt-I···I interaction in which
3
crystallization solvent.
platinum bound iodine atom also acts as weak XB acceptor
In halogen bonded complex 1a the nitrogen atom of the non- also observed in PtMe IL·2IPFB, where L is 4Ј-chloro-
3
coordinated pyridyl group acts as XB acceptor by forming rel- 2,2Ј:6Ј,2ЈЈ-terpyridine [I···I distance 3.5711(8) Å, RXB 0.90],
atively short distanced I···N interaction with iodine atom of PtMe IL·IPFB, where L is 4Ј-(4-cyanophenyl)-2,2Ј:6Ј,2ЈЈ-ter-
3
DITFB [I···N distance 2.866(6) Å with C–I···N angle of pyridine [I···I distance 3.4955(7) Å, RXB 0.88] and
1
(
73.5(2)°] with XB interaction ratio RXB 0.81 [RXB = dXB
/
PtMe IL·2IPFB, where L is 4Ј-(4-tolyl)-2,2Ј:6Ј,2ЈЈ-terpyridine
3
Xvdw + Bvdw)].[42] The RXB value for I···N interaction between [I···I distance 3.4179(11) Å, RXB 0.86].
[28]
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Conclusions
We herein reported the synthesis and structural characteriza-
tion of a new trimethylplatinum(IV) iodide complex of 4Ј-(4-
methoxyphenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine ligand L, {PtMe IL}
3
(1). The complex 1 was synthesized by the reaction between
trimethylplatinum(IV) iodide and ligand L in equimolar ratio
1
in chloroform and characterized by H NMR spectroscopy,
CHN analysis, Mass spectrometry and single-crystal X-ray dif-
1
fraction study. H NMR spectrum of 1 shows the presence of
three chemically non-equivalent methyl groups in the complex.
In addition, presence of ten signals for the hydrogen nuclei of
terpyridine core also revealed bidentate nature of the ligand L,
which is further confirmed by the crystal structure of 1. The
crystal structure of 1 shows that platinum metal is in distorted
octahedron environment being coordinated by three methyl
groups, one iodine atom and two nitrogen atoms from the ter-
pyridine ligand (bidentate ligand). Furthermore, complex 1
upon crystallization with 1,4-diiodotetrafluorobenzene from
the halogen bonded complex 1a. The structural investigation
shows that 1a exhibits the halogen bonding interaction in
Figure 5. The molecular structure of XB complex 1a with thermal
ellipsoids at 50% probability level (top) and with CPK view (bottom),
showing I···N and I···I interactions. The hydrogen atoms are omitted which the non-coordinated pyridyl nitrogen acts as halogen
for clarity. I···I distance 3.5009(8) Å with C–I···I angle 159.5(2)°; I···N
distances 2.866(6) Å with C–I···N angles of 173.5(2)°.
bond acceptor by forming I···N interaction with iodine atom of
DITFB. In addition iodine atom of complex 1 also acts as weak
halogen bond acceptor.
In the crystal packing of 1a, the platinum(IV) centers are
connected to each other by DITFB with the help of I···N and
Acknowledgements
I···I interactions (Figure 5). Furthermore, phenyl ring of terpyr-
idine ligand in 1a also exhibits weak π···π interaction with
one of the pyridine rings of terpyridine moieties of adjacent
The authors would like to thank Dr. Elina Kalenius for the measure-
ment of the mass spectra.
molecules of 1a. Moreover, oxygen atom of methoxy group
exhibits weak C-H···O interactions with methyl group of adja-
cent molecule of complex 1a. In addition, iodine atom also
Keywords: Halogen bond; Trimethylplatinum(IV); Terpyrid-
ine; 1,4-Diiodotetrafluorobenzene (DITFB) / X-ray diffraction
experienced weak halogen···C–H interaction with phenyl ring
hydrogen atoms (Figure 6).
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[
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Published Online: ᭿
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Journal of Inorganic and General Chemistry
ARTICLE
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D. Das, S. Sutradhar, K. Rissanen, B. N. Ghosh* ........... 1–7
Synthesis and Structure of Trimethylplatinum(IV) Iodide Com-
plex of 4Ј-(4-Methoxyphenyl)-2,2Ј:6Ј,2ЈЈ-terpyridine Ligand
and its Halogen Bonding Property
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