Reaction of Mo(CO)4(NCCH3)2 and 7-aza-2-Tosylnorbornadiene
摘要:
Reaction of Mo(CO)(4)(NCCH3)(2) and 7-aza-2-tosylnorbornadiene (7-azaNBD) yielded five air-stable Mo complexes. One is Mo(CO)(4)(eta(4)-7-azaNBD), in which the molybdenum atom is chelated by the two pi-bonds of 7-azaNBD. The other four are isomers of Mo(CO)(2)( eta(2)-7-azaNBD)(2), in which the molybdenum atoms are chelated by the nitrogen atom and one of the two double bonds of 7-azaNBD. In one pair of the isomers, the metal binds to C(2)=C(3) of both 7-azaNBD ligands; whereas in the other pair of isomers the metal binds to C(2)=C(3) of one 7-azaNBD ligand and C(5)=C(6) of another ligand. All structures were fully characterized by NMR spectra. A single crystal of compound 4 was analyzed by X-ray diffraction analysis, which was found to be monoclinic with a = 8.4199 b = 23.984, c = 16.395 angstrom, and beta = 99.99 degrees. (c) 2005 Elsevier B.V. All rights reserved.