title: Substitutional disorder in a hypervalent diorganotin(IV) dihalide.
abstract: The structure of bromidochloridobis[2-(dimethyl-amino-meth-yl)phen-yl]tin(IV), [SnBr(0.65)Cl(1.35)(C(9)H(12)N)(2)], contains two 2-(Me(2)NCH(2))C(6)H(4) units bonded to a Sn atom which lies on a twofold axis. The compound exhibits substitutional disorder of the halide atoms bonded to the Sn, with 1.35 occupancy for Cl and 0.65 for Br; it is isomorphous with the corresponding dichloride. The Sn atom is hexa-coordinated with a (C,N)(2)SnX(2) (X = Cl/Br) distorted octa-hedral core as a result of the strong intra-molecular N→Sn coordination trans to the Sn-X bonds (N1-Sn1-X1 = 165.8°). As a result of the inter-molecular contacts, viz. H⋯X and H⋯benzene inter-actions, the mol-ecules are arranged in a three-dimensional supra-molecular manner in the crystal structure.
authors.affiliation: Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Arany Janos Str. no. 11, RO-400028, Cluj Napoca, Romania.
authors.forename: Adina
authors.initials: A
authors.lastname: Rotar
authors.forename: Richard A
authors.initials: RA
authors.lastname: Varga
authors.forename: Cristian
authors.initials: C
authors.lastname: Silvestru