1204
M. Singh et al. / Polyhedron 28 (2009) 1197–1204
[Mn2(Hmbhcd)2(2,20-bpy)2(
l-OAc)2]. The chain grows infinitely in
Appendix A. Supplementary data
1 D along the a axis with the help of C4A–H4AAꢀ ꢀ ꢀO11 and
p p
ꢀ ꢀ ꢀ
interactions between two successive 2,20-bpy rings (Fig. 7). The
distance between the centroids (Cg) of two 2,20-bpy ligands of
CCDC 656090, 677286 and 701544 contain the supplementary
crystallographic data for 1, 3 and 4. These data can be obtained free
from the Cambridge Crystallographic Data Centre, 12 Union Road,
Cambridge CB2 1EZ, UK; fax: (+44) 1223 336 033; or e-mail: de-
posit@ccdc.cam.ac.uk. Supplementary data associated with this
article can be found, in the online version, at doi:10.1016/
two adjacent units of [Mn2(Hmbhcd)2(2,20-bpy)2(
l
-OAc)2] is
stacking interactions
p p stacking interactions between the two units
3.262 Å, which is within the range of
(3.3–3.7 Å). The
of molecules, intermolecular hydrogen bonding, C4A–H4AAꢀ ꢀ ꢀ
O11 = 2.641 Å, and short contact of C4A–H4AAꢀ ꢀ ꢀC11A = 2.562 Å
connect the sheets into a 1D coordination framework (Fig. 7).
p p
ꢀ ꢀ ꢀ
ꢀ ꢀ ꢀ
The 2,20-bpy ligand forms C–Hꢀ ꢀ ꢀ
p interactions with the phenyl
ring of the 2-methoxy benzene ring with a distance of C–Hꢀ ꢀ ꢀ
Cg(2-methoxy ring) of 2.907 Å (Fig. 8). There is intermolecular hydro-
gen bonding, C1–H1C(2-methoxy benzene ring)ꢀ ꢀ ꢀS1 = 2.931 Å and C10–
H10Bꢀ ꢀ ꢀO11 (CH2 of benzyl ring) = 2.394 Å, which extends the crys-
tal packing and gives a three dimensional framework. The weak
intermolecular interactions are listed in Table 6.
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In this work, the synthesis and spectral studies of Mn(II), Co(II)
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[Mn(Hmbhcd)2(o-phen)] ꢀ DMSO (3) and [Mn2(Hmbhcd)2(2,20-
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One of the authors (M. Singh) is thankful to CSIR, New Delhi, In-
dia for the award of SRF, supported by Grant No. 9/13(160)2008/
EMR-I.