Lewis acid stabilized methylidene and oxoscandium complexes.
The methylidene scandium complex (PNP)Sc(mu3-CH2)(mu2-CH3)2[Al(CH3)2]2 (PNP = N[2-P(CHMe2)2-4-methylphenyl]2-) can be prepared from the reaction of (PNP)Sc(CH3)2 and 2 equiv of Al(CH3)3. The Lewis acid stabilized methylidenes candium complex has been crystallographically characterized, and its bonding scheme analyzed by DFT. In addition, we report preliminary reactivity studies of the Sc-CH2 ligand with substrates such as H2NAr and OCPh2. While the former results in an Brønsted acid-base reaction, the latter reagent produces the olefin H2C CPh2 along with the novel oxoscandium complex (PNP)Sc(mu3-O)(mu2-CH3)2[Al(CH3)2]2, quantitatively.
Department of Chemistry, Molecular Structure Center, and the School of Informatics, Indiana University, Bloomington, Indiana 47405, USA.
Jennifer
J
Scott
Hongjun
H
Fan
Benjamin F
BF
Wicker
Alison R
AR
Fout
Mu-Hyun
MH
Baik
Daniel J
DJ
Mindiola