Ya. Andrianov et al., PECULIARITIES OF DISSOCIATIVE IONIZATION OF ALKYLCYCLOPENTADIENYL NITROSYL PI-COMPLEXES OF NICKEL, Russian chemical bulletin, 42(11), 1993, pp. 1902-1905
The decomposition of alkylcyclopentadienyl nitrosyl pi-complexes of ni
ckel, (C5H4R)(NO)Ni (R = H, Et, i-Pr, CH2Ph), under the action of elec
tron impact has been studied. The nature of the nitrosyl ligand has be
en shown to be the factor determining the main fragmentation pathway w
hich involves the abstraction of an NO molecule. The effect of the nat
ure of the ligand on the ability of the molecular ion (C5H4R)LNi+ (L =
C5H4R, C5H5, C3H5, NO) to rearrange with hydrogen atom migration from
one ligand to another has been considered. The structure of the alkyl
group R determines a competing fragmentation pathway involving cleava
ge of the beta-C-C bond with respect to the cyclopentadienyl ring in t
he substituent.