Chemical bonding in methylidyne complexes Neutron diffraction study on a single crystal of BrW3 (CH(dmpe-d)12)2 at 100 K and 293 K.

C. Ménoret (1) , Anne Spasojevic - de Biré (1) , Q.D. Nguyen (1) , A. Cousson (2) , Jean-Michel Kiat (1, 2) , J.D. Manna (3) , M.D. Hopkins (4)

1 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
2 LLB - UMR 12 - Laboratoire Léon Brillouin
3 Department of Chemistry (University of Pittsburgh)
4 Department of Chemistry [Chicago]

Carbyne complexes have been extensively studied but only a few of them contain the M[triple bond, length as m-dash]C–H moiety (M = transition metal). In order to contribute to the debate about the linearity of this fragment, two neutron diffraction experiments on single crystal have been performed at 100 and 293 K on the trans-W(CH)(dmpe)2Br (dmpe = 1,2-bis(dimethylphosphino)ethane) (1). The results point, without ambiguity, to the linearity of the fragment. The specific behaviour of the dmpe ligand is modelled and interpreted.

Mots clés: Neutron diffraction; Organometallics; Complexation; Single crystals; Carrier concentration; Chemical bonds; X ray diffraction analysis; X-ray structures

Domaines: Matériaux

C. Ménoret, Anne Spasojevic - de Biré, Q.D. Nguyen, A. Cousson, Jean-Michel Kiat, et al.. Chemical bonding in methylidyne complexes Neutron diffraction study on a single crystal of BrW3 (CH(dmpe-d)12)2 at 100 K and 293 K.. Journal of the Chemical Society, Dalton Transactions, 2002, 19, pp.3731-3736. ⟨10.1039/b204383a⟩. ⟨hal-02296844⟩