ELECTROPHILIC ATTACK ON THE CARBON TERMINUS OF A NIOBIUM-BOUND FORMALDEHYDE LIGAND

Authors
THIYAGARAJAN B KERR ME BOLLINGER JC YOUNG VG BRUNO JW
Citation
B. Thiyagarajan et al., ELECTROPHILIC ATTACK ON THE CARBON TERMINUS OF A NIOBIUM-BOUND FORMALDEHYDE LIGAND, Organometallics, 16(6), 1997, pp. 1331-1334
Citations number
40
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Organometallics → ACNP
ISSN journal
02767333
Volume
16
Issue
6
Year of publication
1997
Pages
1331 - 1334
Database
ISI
SICI code
0276-7333(1997)16:6<1331:EAOTCT>2.0.ZU;2-N
Abstract
The niobocene formaldehyde complex Cp'Nb-2(Cl)(eta(2)-CH2O) (1, Cp' = eta(5)-C(5)H(4)SiMe(3)) reacts with [Ph(3)C][BF4] to give an alkoxide (2) of formula [Cp'Nb-2(Cl)(OCH(2)CPh(3))][BF4] and with HBF4 . OEt(2) to give analogue 4 ([Cp'Nb-2(Cl)(OMe)][BF4); these processes constitu te examples of electrophilic attack on the formaldehyde carbon, instea d of the more typical addition at oxygen. Compound 2 is hydrolyzed to Cp'Nb-2(Cl)(OBF3) (3), a Lewis acid adduct of the corresponding metal oxide; both 2 and 3 have been characterized by X-ray crystallography.