4713-59-1Relevant academic research and scientific papers
Thiazole complexes of diorganotinf(IV) dihalides: The crystal structure of dichlorodiphenylbis(thiazole) tint(IV)
Alvarez Boo,Couce, Maria D.,Freijanes,Casas,Castineiras,Sanchez Gonzalez,Sordo,Russo
, p. 253 - 258 (1996)
The reaction of thiazole (Tz) with diorganotin(IV) dihalides yielded compounds of type [SnR2X2(Tz)2] (R = Me, Et, Ph; X - Cl, Br). The structure of dichlorodiphenylbis(thiazole)tin(IV) was determined by X-ray diffraction. The crystals are monoclinic (space group P21/c) and consist of discrete trans-SnPh2Cl2(Tz)2 units with the metal atom coordinated to two Cl atoms, two phenyl carbons, and the N atoms of two thiazole rings. Moessbauer and IR spectra suggest similar trans-stereochemistry for the other complexes prepared. The behavior of these compounds in solution was studied by conductimetry and NMR techniques.
Dibromo-diphenyl-stannane: Isolated centrosymmetric dimers as a new structure motif for the inter-molecular association of diorganotin(IV) dihalides
Ye, Fei,Reuter, Hans
, p. m104-m108 (2012)
In the crystalline state, the low-melting title compound [common name: diphenyl-tin(IV) dibromide], [SnBr2(C6H5)2], consists of distorted tetra-hedral mol-ecules with compressed halide and enlarged carbon opening angles of 102.741 (9) and 123.53 (8)°, respectively, and Sn - C and Sn - Br bond lengths of 2.109 (2)/2.113 (2) and 2.4710 (3)/2.4947 (3) A, respectively. Inter-molecular Sn...Br inter-actions, typical for diorganotin(IV) dihalides, R 2SnHal2 (with Hal = Cl, Br, I), and sterically less demanding organic groups lead to the formation of a hitherto unknown association pattern consisting of centrosymmetric dimers with an anti-parallel orientation of the dipole moments and two weak inter-molecular Sn...Br distances of 3.8482 (3) A between one of the two Br atoms and its neighbouring Sn atom, and vice versa. The second Br atom is not involved in inter-molecular inter-actions and lies somewhat outside the association plane that, therefore, is not coplanar [inter-planar angle = 1.750 (2)°] with the tin-halide plane. The new structure motif of inter-molecular tin-halide inter-action can be classified as 2a i , which indicates the number of mol-ecules (i.e. 2) composing the oligomer, the anti-parallel orientation (i.e. a) of their dipole moments and the centre of symmetry (i.e. i) giving rise to the association pattern.
New bis-o-benzosemiquinonato tin(IV) complexes
Ilyakina, Ekaterina V.,Poddel'Sky, Andrey I.,Piskunov, Alexandr V.,Somov, Nikolay V.,Abakumov, Gleb A.,Cherkasov, Vladimir K.
, p. 282 - 288 (2013/03/14)
New bis-o-benzosemiquinonato tin(IV) complexes (3,6-SQ) 2SnCl2, (3,6-SQ)2SnBr2 and (3,6-SQ)2SnPh2 (3,6-SQ is radical-anion 3,6-di-tert-butyl-o-benzosemiquinone) were synthesized by differen
Complexes of tin(IV) halides and diorganotin(IV) dihalides with 3,5-dimethyl-1-(2′-pyridyl)pyrazole
álvarez-Boo, Pedro,Casas, José S.,Casti?eiras, Alfonso,Couce, María D.,Freijanes, Eduardo,Furlani, Ariella,Russo, Umberto,Scarcia, Vito,Sordo, José,Varela, Manuela
, p. 8 - 14 (2008/10/08)
3,5-Dimethyl-1-(2′-pyridyl)pyrazole (DMPP) reacts with SnX 4 and R2SnX2 (X=Cl, Br, I; R=Me, Et, Bu, Ph) to yield adducts of types [SnX4(DMPP)] and [SnR2X 2(DMPP)], respectively. The structure of [SnEt2Br 2(DMPP)] has been determined by X-ray diffractometry. The crystal consists of discrete [SnEt2Br2(DMPP)] molecules with the metal atom octahedrally coordinated to two Br atoms [Sn-Br=2.631(3), 2.703(3) ?; Br-Sn-Br=98.00(10)°], two ethyl carbons [Sn-C=2.11(3), 2.143(19) ?; C-Sn-C=172.3(11)°] and the two donor N atoms of the ligand [Sn-N=2.379(16), 2.387(16) ?; N-Sn-N=66.8(6)°]. The IR data and M?ssbauer parameters are consistent with all the organotin derivatives having, similar geometry whereas in the case of the [SnX4(DMPP)] complexes the results of both techniques support the expectation of cis stereochemistry. The 1H NMR data indicate significant dissociation in solution. The chlorobutyl derivative exhibited significant in vitro antitumour activity against the human carcinoma cell line KB.
A novel route for the preparation of dimeric tetraorganodistannoxanes
Beckmann, Jens,Dakternieks, Dainis,Kuan, Fong Sheen,Tiekink, Edward R.T
, p. 73 - 83 (2007/10/03)
The reaction of polymeric diorganotin oxides, (R2SnO)n (R = Me, Et, n-Bu, n-Oct, c-Hex, i -Pr, Ph), with saturated aqueous NH4X (X = F, Cl, Br, I, OAc) in refluxing 1,4-dioxane afforded in high yields dimeric tetraorganodistannoxanes, [R2(X)SnOSn(X)R2]2, and in a few cases diorganotin dihalides or diacetates, R2SnX2. The reported method appears suitable for the synthesis of fluorinated tetraorganodistannoxanes. Identification of [R2(OH)SnOSn(X)R2]2 (R=n-Bu; X = Cl, Br) and [R2(OH)SnOSn(X)R2] [R2(X)SnOSn(X)R2] suggest a serial substitution mechanism starting from [R2(OH)SnOSn(OH)R2]2. X-ray crystal structure determinations are reported for [Me2(AcO)SnOSn(OAc)Me2]2 (29a), [i-Pr2(Br)SnOSn(Br)i-Pr2]2 (20a), [c-Hex2 (F)SnOSn(F)c-Hex2]2 (5a) and [c-Hex2(F)SnOSn(Cl)c-Hex2]2 (36), respectively. These show the presence of a central (R2Sn)2O2 core that is connected, via the oxygen atoms, to R2Sn entities. Acetate (29a) or halides (5a, 20a, 36) complete the coordination about the tin centres.
Easy general method for interhalide conversions in organotin compounds
Zobel, Bernhard,Lim, Allan E. K.,Dunn, Kerri,Dakternieks, Dainis
, p. 4889 - 4890 (2008/10/08)
The halides in organotin halides are easily interconverted in excellent yields using aqueous ammonium halide solutions and various organic solvents.
Sulphur(IV) compounds as ligands. XX. Adduct formation and ring opening of thiirane-1-oxide with organotin halides. Crystal structure of
Schenk, Wolfdieter A.,Khadra, Almuetassem,Burschka, Christian
, p. 75 - 86 (2007/10/02)
The organotin halides RnSnX4-n (R=Ph, 4-MeC6H4, 4-FC6H4; X=Cl, Br; n=0, 1, 2, 3) and Me2SnCl2 form adducts with thiirane-1-oxide.In general, for n=0, 1, 2 these have a 1:2 stoichiometry and are octahedral, as shown by a single-crystal structural study of (4c).In 4c the aryl groups are trans to each other and the chloride and sulphoxide ligands mutually cis.The S-O bond is 0.04 Angstroem longer than that in uncoordinated thiirane-1-oxide, whereas the bonds within the three-membered ring are shortened by a similar amount.Depending on the reaction conditions, 1:1 adducts (R=4-MeC6H4, X=Cl, Br; R=Me, t-Bu, X=Cl) can also be isolated, while triorganotin halides form only 1:1 complexes.Analogous dimethylsulphoxide (DMSO) adducts have been synthesized for comparison.On the basis of vibrational spectroscopic data it can be concluded that thiirane-1-oxide is a weaker base than DMSO.This is supported by an NMR study of the formation of the 1:1 adduct between Me2SnCl2 and thiirane-1-oxide (9), which gave the following thermodynamic data: Keq=8.6 M-1, ΔHR = -20.4 kJ mol-1, ΔSR = -50 J mol-1 K-1.Decomposition of the thiirane-1-oxide adducts at room temperature gives the thiosulphinic acid esters XC2H4S(O)SC2H4X (X=Cl; 18a, Br: 18b) in high yields.Key words: Tin; Sulfur; Sulfoxide
Interaction of naphthaleneytterbium with tetraphenyltin. Molecular structure of Ph3SnYb(THF)2(μ-Ph)3Yb(THF)3
Bochkarev, Mikhail N.,Khramenkov, Vladimir V.,Rad'kov, Yury F.,Zakharov, Lev N.,Struchkov, Yury T.
, p. 29 - 38 (2007/10/02)
Reaction of naphthaleneytterbium with Ph4Sn in THF yields (Ph3Sn)2Yb(THF)4 and the heteroleptic complex Ph3SnYb(THF)2(μ-Ph)3Yb(THF)3 (1), which can be isolated by crystallization from THF/ether solution.The product 1 forms triclinic crystals in space group P1 with a = 11.123(2), b = 14.078(3), c = 18.774(4) Angstroem, α = 101.94(2), β = 96.20(2), γ = 109.85(2) deg, Z = 2.Least-squares refinement on the basis of 4955 reflections led to a final R value of 0.027.The molecule of 1 contains two Yb atoms connected by three bridging Ph rings.One of Yb atoms is bonded with Ph3Sn unit (Sn-Yb bond length is 3.379(1) Angstroem) and two THF molecules.The second Yb atom is surrounded by three molecules of coordinated THF.Coordination of each ytterbium atom is distorted octahedron.The proposed reaction scheme includes two-electron oxidation of naphthaleneytterbium, formation of Ph3SnYbPh and PhYbPh intermediates and their following association.
THE SYNTHESIS AND TIN-119m MOESSBAUER SPECTRA OF SOME DIORGANOTIN DIHALIDE AND DIPSEUDOHALIDE COMPLEXES WITH NITROGEN AND OXYGEN-DONOR LIGANDS
Crowe, Alan J.,Smith, Peter J.
, p. 223 - 236 (2007/10/02)
The synthesis and 119mSn Moessbauer spectra of 114 complexes of the type R2SnX2, L2 (R = Me, Et, n-Pr, n-Bu, n-Oct, Ph, Bz; X = F, Cl, Br, I, NCS; L2 = 2 monodentate or 1 bidentate O- or N-donor ligand(s)), 74 of which are new, are reported.The majority of the complexes are isostructural, having an octahedral trans-R2SnX4 geometry about tin, whilst five of the diphenyltin complexes (R = Ph; X = Cl; L2 = AMP, Nphen; X = NCS; L2 = bipy, phen, TMphen) adopt a cis-R2SnX4 octahedral structure.A convenient method for the synthesis of a number of novel 1:1 diorganotin difluoride complexes using hot acetonitrile is reported and a structure for the unusual adduct, Ph2SnF2 * 0.5 phen, is proposed.
A NOVEL SYNTHETIC ROUTE TO DIORGANOTIN DICHLORIDES AND DIBROMIDES
Chandrasekaran, R. K.,Venkataraman, S.,Koola, Johnson D.
, p. C43 - C44 (2007/10/02)
Diorganotin dichlorides and dibromides can be prepared by a simple and convenient one-step process involving the reaction of Grignard reagent with (Acac)2SnX2 (Acac H = pentane-2,4-dione; X = Cl or Br).The yields of lower diorganotin dihalides are excellent while those of higher diorganotin dihalides are moderate.
