Abstract
The crystal and molecular structure of dipotassium di-μ-oxo-bis[aqua(oxalato-O1,O2)oxomolybdenum(III)] trihydrate, K2[Mo2O4(C2O4)2(H2O)2]·3H2O, has been determined from X-ray diffraction data. In the dimeric anion, which has approximate twofold symmetry, each Mo atom is in a distorted octahedral coordination, being bonded to one terminal oxo-O atom, two bridging O atoms, two O atoms from the oxalato ligand and one from the water molecule. Bond lengths trans to the multiple-bonded terminal oxo ligand are larger than those in the cis position, confirming the trans influence as a generally valid rule.
