Publication Date:
2012-08-01
Description:
The reaction of the di-lithiated oxamide of 1 with two equivalents of SnCl 2 provided the tin trans -oxamide 3 . In solution, spectroscopic analysis suggests exclusively the formation of a trans -oxamide ( trans - 3 ). However, the solid state shows an atypical cis -oxamide ( cis - 3 ), where the oxamide fragment acts as an anti-Janus head ligand. An 119 Sn-NMR variable temperature experiment ([D 8 ]THF) of the trans -oxamide ( trans - 3 ) was performed however, at lower temperature no additional signal was observed, which confirmed the absence of a dynamic equilibrium. Dispersion-corrected density functional calculations revealed that the cis conformation of this tin(II) oxamide complex is more stable than the trans isomer by 1.4 kcal · mol –1 .
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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