Neutron Diffraction Study of [Nd(AlMe4 )3 ]⋅0.5 Al2 Me6 at 100 K: The First Detailed Look at a Bridging Methyl Group with a Trigonal-Bipyramidal Carbon Atom

Wim T Klooster; Roy S Lu; Reiner Anwander; William J Evans; Thomas F Koetzle; Robert Bau

doi:10.1002/(SICI)1521-3773(19980518)37:9<1268::AID-ANIE1268>3.0.CO;2-Y

Neutron Diffraction Study of [Nd(AlMe₄ )₃ ]⋅0.5 Al₂ Me₆ at 100 K: The First Detailed Look at a Bridging Methyl Group with a Trigonal-Bipyramidal Carbon Atom

Angew Chem Int Ed Engl. 1998 May 18;37(9):1268-1270. doi: 10.1002/(SICI)1521-3773(19980518)37:9<1268::AID-ANIE1268>3.0.CO;2-Y.

Authors

Wim T Klooster¹, Roy S Lu², Reiner Anwander³, William J Evans⁴, Thomas F Koetzle¹, Robert Bau²

Affiliations

¹ Chemistry Department, Brookhaven National Laboratory" Upton, NY 11973, (USA).
² Department of Chemistry, University of Southern California" Los Angeles, CA 90089, (USA), Fax: (+1) 213-740-0930.
³ Institut für Anorganische Chemie der Technischen Universität, München, D-85747 Garching (Germany).
⁴ Department of Chemistry, University of California at Irvine, Irvine, CA 92697 (USA).

Abstract

Weak agostic Nd⋅⋅⋅H interactions and Nd-C bonds are involved in the bonding of the bridging methyl groups in the title compound (see sketch on the right): Two of the three H atoms of the methyl group are directed at the Nd center. The C atoms have distorted trigonal-bipyramidal geometry with the Nd atom and one of the H atoms (H_A ) as axial ligands, and the Al atom and the other two H atoms (H_B and H_C ) in equatorial positions. The Al₂ Me₆ "solvate" molecule is disordered.

Keywords: Aluminum; Bridging ligands; Coordination modes; Lanthanides; Pentacoordinate carbon.