Mechanistic studies on hydrazido(2–)-complexes. Cleavage of the nitrogen–nitrogen bond in the reaction of [Mo{NN(CH2)4CH2}(Ph2PCH2CH2PPh2)2] with acid
- 1 January 1989
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 3,p. 425-430
- https://doi.org/10.1039/dt9890000425
Abstract
The kinetics of the reaction between [Mo{N[graphic omitted]H2}(dppe)2](dppe = Ph2PCH2CH2PPh2) and [NHEt3]BPh4 to yield [graphic omitted]H2 and [MoN(NCR)(dppe)2]BPh4(RCN is the solvent; R = Me, Et, or Ph) has been studied. In general the mechanism of the reactions involves two parallel pathways. Initial rapid protonation of the hydrazido(2–)-ligand and attack of a solvent molecule at the metal yields the spectrophotometrically detected hydrazidium species, trans-[Mo{N[graphic omitted]H2}(NCR)(dppe)2]+. This species can either undergo slow nitrogen–nitrogen cleavage or react via an acid-catalysed pathway involving trans-[Mo{NH[graphic omitted]H2}(NCR)(dppe)2]2+ to yield the products. The factors influencing whether protonation of hydrazido(2–)-ligands results in amine formation (N–N bond cleavage) or hydrazine formation (N–N bond cleavage) are discussed.Keywords
This publication has 0 references indexed in Scilit: