157173-81-4Relevant academic research and scientific papers
Oxidation of the zwitterion (CO)5WNPhNPhC(OMe)Ph with I2. Formation of tungsten(IV) imido complexes and a tungsten(VI) metallacycle
Barnett, Nicholas D. R.,Massey, Scott T.,McGowan, Patrick C.,Wild, Jennifer J.,Abboud, Khalil A.,McElwee-White, Lisa
, p. 424 - 428 (1996)
Reaction of the zwitterion (CO)5WNPhNPhC(OMe)Ph (1) with 1 equiv of I2 produces the iodo-bridged imido dimer [(CO)2W(NPh)I2]2 (2) and the imidate PhN=C(OMe)Ph. Oxidation of 1 with 2 equiv of I2, however, leads to the formation of the unusual 16-electron tungsten(VI) metallacycle I3(PhN)WNPhCPhO (8). The structure of 8 was determined by X-ray crystallography. Mechanistic studies on the formation of both 2 and 8 are consistent with initial iodination of the metal center of 1, followed by N-N bond cleavage to form (CO)3W(NPh)I2 as a common intermediate. Loss of a labile CO ligand and dimerization produces 2, while further oxidation with a second equivalent of I2 and reaction with the side product PhN=C(OMe)Ph leads to 8 and MeI. Treatment of dimer 2 with two-electrondonor ligands results in the formation of compounds of the type (CO)2I2W(NPh)L, where L = THF, CH3CN, pyridine, NEt3, or 2,4,6-Me3C6H2NH2.
Oxidation of the zwitterionic tungsten amide (OC)5WNPhNPhC(OMe)Ph with Br2 and PCl5. Formation of [(PhN)W(CO)2X2]2 and (PhN)W(CO)2X2L (X = Br or Cl; L = MeCN, Me3
He, Yingxia,McGowan, Patrick C.,Abboud, Khalil A.,McElwee-White, Lisa
, p. 3373 - 3378 (2007/10/03)
Oxidation of the zwitterionic tungsten amide (OC)5WNPhNPhC(OMe)Ph 1 with Br2 or PCl3 produced [(PhN)W(CO)2X2]2 (X = Cl or Br). These halide-bridged tungsten(IV) dimers reacted with MeCN to
