Chemistry Letters, Vol.34, No.1, 44-45, 2005
Monooxomolybdenum(IV) complex with extremely bulky dithiolate ligands -Acceleration of O-atom transfer by distorted square pyramidal conformation
Q(2)[(MoO)-O-IV{1,2-S-2-3,6-(Ph3CCONH)(2)C6H2}(2)] (Q = NEt4 (1), PPh4 (2)) was synthesized and characterized as a model for Mo-enzymes. The crystal structure of 2 shows the slightly distorted square pyramidal core, (MoOS4)-O-IV. The O-atom transfer reaction from Me3NO to Me3N in the presence of I proceeds at 30 to 48 times higher rates than in the presence of [(MoO)-O-IV{1,2-S-2-(C6H4)}(2)](2-) (3).