Abstract
Room-temperature 13 C NMR spectra of the d 1 -d 1 dimer [Mo 2 O 3 {S 2 13 CN(CH 2 Ph) 2 } 4 ] (1) exhibit a broad singlet for the thiocarboxylate ligand. The molecule is fluxional, and in the low-temperature limit this singlet is replaced by two assymetrical doublets (with components at δ 207.4, 207.2 and δ 200.7, 199.7) assigned to the thiocarboxylate ligands with one S trans to the bridging oxo group and one S trans to the terminal oxo group respectively of the syn and the anti isomers of 1
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