title: Highly Reactive Scandium Phosphinoalkylidene Complex: C-H and H-H Bonds Activation.
abstract: The first scandium phosphinoalkylidene complex was synthesized and structurally characterized. The complex has the shortest Sc-C bond lengths reported to date (2.089(3) Å). DFT calculations reveal the presence of a three center π interaction in the complex. This scandium phosphinoalkylidene complex undergoes intermolecular C-H bond activation of pyridine, 4-dimethylamino pyridine and 1,3-dimethylpyrazole at room temperature. Furthermore, the complex rapidly activates H2under mild conditions. DFT calculations also demonstrate that the C-H activation of 1,3-dimethylpyrazole is selective for thermodynamic reasons and the relatively slow reaction is due to the need of fully breaking the chelating effect of the phosphino group to undergo the reaction whereas this is not the case for H2.
authors.affiliation: State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, P. R. China.
authors.forename: Weiqing
authors.initials: W
authors.lastname: Mao
authors.affiliation: State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, P. R. China.
authors.forename: Li
authors.initials: L
authors.lastname: Xiang
authors.affiliation: LPCNO, CNRS & INSA, Université Paul Sabatier , 135 Avenue de Rangueil, 31077 Toulouse, France.
authors.forename: Carlos
authors.initials: C
authors.lastname: Alvarez Lamsfus
authors.affiliation: LPCNO, CNRS & INSA, Université Paul Sabatier , 135 Avenue de Rangueil, 31077 Toulouse, France.
authors.forename: Laurent
authors.identifier: 0000-0003-2653-8557
authors.initials: L
authors.lastname: Maron
authors.affiliation: State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, P. R. China.
authors.forename: Xuebing
authors.initials: X
authors.lastname: Leng
authors.affiliation: State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, P. R. China.
authors.forename: Yaofeng
authors.initials: Y
authors.lastname: Chen