Kozo Fukumoto

N−CN Bond Cleavage of Cyanamides by a Transition-Metal Complex

N-CN bond cleavage of cyanamides (R(2)N-CN) has been attained at room temperature in the reaction of R(2)N-CN with Cp(CO)(2)Fe(SiEt(3)). The mechanistic investigation revealed that silyl migration from Fe to CN nitrogen of cyanamide gave an N-silylated eta(2)-amidino iron complex, which was isolated and characterized by X-ray analysis. Catalytic N-CN bond cleavage was also attained using a methyl molybdenum complex under thermal conditions.

Fac-mer Isomerization of Mo(CO)3(Phosphite)3 Caused by Interaction Between Phosphite Oxygen and Silane Silicon

Abastract The isomerization of Mo(CO)3{P(OMe)3}3 from fac to mer forms was found to be catalyzed by Me3EX (E = Si, Ge, Sn; X = Cl, Br, I), and reached the equilibrium. The catalytic activity depends on E (Si > Ge > Sn) and on X (Cl < Br < I), whereas the final equilibrium position was independent of the kinds of E and X. A plausible mechanism for the isomerization was discussed.