Journal
JOURNAL OF COORDINATION CHEMISTRY
Volume 65, Issue 2, Pages 278-285Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2011.648186
Keywords
Homobimetallic complexes; Spectroscopy; Semi-empirical study; DFT
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Funding
- Higher Education Commission, Islamabad, Pakistan
- Pakistan Science Foundation [PSF/Res/P-GCU/Chem(436)]
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Homobimetallic carboxylates with general formulae (R3Sn)(2)L (where R = Me, n-Bu, Ph and L=acetylene dicarboxylate dianion) have been synthesized by refluxing disodium salt of acetylene dicarboxylic acid with triorganotin chlorides in 1 : 2 (L : M) molar ratio in methanol under reflux. These complexes have been characterized by elemental analyses, FTIR, and multinuclear NMR (H-1, C-13) spectroscopies. DFT calculations have been performed for structural elucidation and results were compared with semi-empirical data. FTIR data indicate bidentate chelation of the ligand with tin and the complexes exhibit five-coordinate geometry in the solid state. Such coordination behavior is also supported by DFT and semi-empirical studies. NMR data confirm four-coordinate geometry in solution.
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