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Title: Palladium(II) complexes of hydrazones derived from 4-dodecyloxybenzoylhydrazine with some aliphatic and aromatic aldehydes and their mesogenic behaviour
Authors: Howlader, M B H
Tarafder, M T H
Islam, M A A A A
Keywords: Coordination chemistry
Liquid crystals
Mesogenic behaviour
Schiff bases
Issue Date: Aug-2009
Publisher: CSIR
Series/Report no.: Int. Cl.<sup>9</sup> C07C251/02; C07F15/00
Abstract: Hydrazinato complexes, Pd[C<sub>12</sub>H<sub>25</sub>OC<sub>6</sub>H<sub>4</sub>C(O)=N-N=CHR]<sub>2</sub>, have been formed by the reaction of ligand precursor, C<sub>12</sub>H<sub>25</sub>OC<sub>6</sub>H<sub>4</sub>C(=O)NHNH<sub>2</sub>, with some aliphatic and aromatic aldehydes such as formaldehyde, acetaldehyde, butyraldehyde, crotonaldehyde, cinnamaldehyde, benzaldehyde, 4-chlorobenzaldehyde, 2-chlorobenzaldehyde and 2, 4-dimethoxybenzaldehyde and subsequent addition of palladium(II) chloride. The complexes have also been formed by the direct reaction of the ligand, C<sub>12</sub>H<sub>25</sub>OC<sub>6</sub>H<sub>4</sub>C(=O)NH-N=CHR, with palladium(II) chloride. All the complexes are square planar in nature. Complex Pd[C<sub>12</sub>H<sub>25</sub>OC<sub>6</sub>H<sub>4</sub>C(O)=N-N=CHCH<sub>2</sub>CH<sub>2</sub>CH<sub>3</sub>]<sub>2</sub> shows enantiotropic behaviour while the complexes Pd[C<sub>12</sub>H<sub>25</sub>OC<sub>6</sub>H<sub>4</sub>C(O)=N-N=CHCH=CHC<sub>6</sub>H<sub>5</sub>]<sub>2</sub> and Pd[C<sub>12</sub>H<sub>25</sub>OC<sub>6</sub>H<sub>4</sub>C(O)=N-N=CHC<sub>6</sub>H<sub>3</sub>(OCH<sub>3</sub>)<sub>2</sub>]<sub>2</sub> show monotropic behaviour.
Description: 1078-1084
ISSN: 0975-0975 (Online); 0376-4710 (Print)
Appears in Collections:IJC-A Vol.48A(08) [August 2009]

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