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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.51A [2012] >
IJC-A Vol.51A(04) [April 2012] >
| Title: | Pd(II) catalyzed transformation of Schiff bases in complexes of the type trans-[PdCl2(NH2Ar-X)2] (X = H, CH3, Cl): Reactivity with aldehydes and Heck coupling reaction |
| Authors: | Kumari, Niraj
Yadav, Vinod Kumar
Záliš, Stanislav
Mishra, Lallan |
| Keywords: | Schiff Base
Palladium
Crystal Structure
DFT Calculations
C-C Heck Coupling |
| Issue Date: | Apr-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Schiff bases of type (R-Ph-N=CH-Ph-CH=N-Ph-R), where, R = H (L1), CH3 (L2) and Cl (L3), in presence of
cis-[Pd(en)Cl2] or [Pd(DMSO)2Cl2] (en = 1,2-diaminoethane, DMSO =
dimethylsulphoxide) give trans-[PdCl2(NH2Ph)2]
(1), trans-[PdCl2(NH2PhCH3)2]
(2) and trans-[PdCl2(NH2PhCl)2]
(3). The complexes are characterized using
spectroscopic (IR, UV-vis and NMR) and X-diffraction techniques. The H-bonding
interaction generates multinuclear supramolecular structure in complex (2) and
(3). Complex
(1) on reaction with benzaldehyde, salicylaldehyde and 4-carboxybenzaldehyde yields complexes of the
type [PdCl2(PhN=CHPh)2] (4), [Pd(PhN=CHPhO)2] (5) and [PdCl2(PhN=CHPhCOOH)2] (6) respectively. The structures have been optimized
using density functional theory at B3LYP level. Heck
coupling reactions of bromobenzene with acrylonitrile and bromobenzene with
ethyl acrylate in the presence of complexes (1), (2) and (3) have been carried out separately. |
| Page(s): | 554-563 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.51A(04) [April 2012]
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