Racemic titanium(IV) complexes of salicylideneamino acids |
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Authors: | Hu Chuanjiang Zhang Wenwei Xu Yan Zhu Huizhen Ren Xiaoming Lu Changsheng Meng Qingjin Wang Huaqin |
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Institution: | (1) Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, P.R. China |
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Abstract: | New racemic complexes of titanium with Schiff bases derived from condensation of salicylaldehyde with dl-alanine (H2Sal-dl-Ala) and dl-valine (H2Sal-dl-Val) have been prepared. The crystal structure of (Sal-dl-Val)2Ti·CH2Cl2 bis(N-salicylidenevalinato)titanate(IV) CH2Cl2] has been solved by single-crystal X-ray diffraction methods; the crystal is a racemate consisting of a pair of enantiomers (Sal-d-Val)2Ti and (Sal-l-Val)2Ti. The Schiff-base ligand acts as a double negatively-charged tridentate ONO chelate, coordinated to the titanium atom. The geometry around titanium is a distorted octahedron. The i.r. and u.v.–vis. spectra of the complexes have been evaluated. |
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