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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(09-10) [September-October 2011] >
| Title: | Incorporation of lead(II) by copper(II)-salicylaldimine type ligand complexes: Cation– interactions in controlling the distortion of coordination geometry around lead(II) |
| Authors: | Biswas, Saptarshi
Ghosh, Ashutosh |
| Keywords: | Coordination chemistry
Copper
Lead
Heterometallic complexes
Di-Schiff base ligands
Schiff bases
Crystal structure
Cation– interactions |
| Issue Date: | Sep-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Two tri-nuclear, hetero-metallic copper(II)-lead(II) complexes, [(CuL1)2Pb(NCS)2]
(1) and [(CuL2)2Pb(NCS)2]
(2) have been synthesized by
reacting the “ligand-complex” [CuL1] and [CuL2]
respectively with Pb(CH3COO)2·3H2O and
ammonium thiocyanate (where H2L1 = N,N¢-bis(salicylidene)-1,3-propanediamine and
H2L2 = N,N¢-bis( -methyl-salicylidene)-1,3-propanediamine
are the tetradentate di-Schiff base ligands) in EtOH-water medium. Both complexes have been characterized by X-ray single crystal
structural analyses. In both structures, the central Pb(II) is six-coordinate,
being bonded to four oxygen atoms from two terminal square planar CuL units and
a couple of thiocyanate nitrogen atoms. The geometry around Pb(II) in both
complexes is far from ideal octahedron and the distortion is more severe in (2). The coordination environment around
all Cu(II) centres are square planar with different degrees of tetrahedral
distortions. There are significant intra- and intermolecular cation-
interactions between the phenyl rings of the Schiff base and Cu(II) that seem
to control the distortion around Pb(II). |
| Page(s): | 1356-1362 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.50A(09-10) [September-October 2011]
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