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Schiff bases functionalized with PPh2 and SPh groups and their Ni(II) and Pd(II) complexes: Synthesis, crystal structures and applications of a Pd complex for Suzuki–Miyaura Coupling by P. Raghavendra Kumar; Shailesh Upreti; Ajai K. Singh is a Chemistry article available to read on EtoBox.

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The reactions of 2-hydroxyacetophenone with NH 2 CH 2 CH 2 SPh and NH 2 CH 2 CH 2 PPh 2 have resulted in Schiff bases having the chemical formulae 2-HO-C 6 H 4 C(CH 3 )@N-CH 2 CH 2 Y (Y = SPh (L 1 ) or PPh 2 (L 4 )), which are potential (N, O, S) and (N, O, P) type ligands. Using an appropriate ketone, the Schiff base 2,4-(HO) 2 -C 6 H 4 C(CH 3 )@N-CH 2 CH 2 SPh (L 2 ) has also been synthesized in a similar fashion. L 1 , L 2 , L 4 and the compounds obtained by borohydride reduction of L 1 and L 2 , viz. 2-HO-C 6 H 4 CH(CH 3 )-NHCH 2 CH 2 Y [Y = SPh (L 3 ) or PPh 2 (L 5 )] have been explored as ligands. In their complexes with Pd(II) and Ni(II), all the five ligands coordinate in a uninegative tridentate mode (N, O À , S/P). The proton, carbon-13 and phosphorus-31 (in the case of L 4 and L 5 ) NMR spectra of all the ligands and their Pd(II) and Ni(II) complexes have been found characteristic. Single crystal structures of L 1 , L 2 , [PdCl(L 1 -H)] (1), [PdCl(L 3 -H)] (3) and [NiCl(L 4 -H)] ( ) have been solved. The bond distances are: Pd-N, 2.005(3)-2.042(7) A ̊; Pd-S, 2.257(2)-2.2644(11) A ̊and Pd-Cl, 2.3091(11)-2.321(2) A ̊. The Ni-P, Ni-N and Ni-Cl bond lengths in 6 are 2.132

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Author

P. Raghavendra Kumar; Shailesh Upreti; Ajai K. Singh

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0277-5387)

Published

2008

Language

EN

Field

Chemistry (Physical Sciences)