title: Self-assembly of halogenated cobaltacarborane compounds: boron-assisted C--H...X--B hydrogen bonds?
abstract: Full structural characterisation and complete synthetic procedures for three monohalogenated cobaltacarborane compounds closo-[3-Co(eta5-C5H5)-8-X-1,2-C2B9H10] (X=Cl (1), Br (2), I (3)) and the dibromo derivative closo-[3-Co(eta5-C5H5)-8,9-Br2-1,2-C2B9H9] (4) are reported. The supramolecular structures of 1, 3, and 4 reveal the existence of intermolecular C--HX--B interactions. The role of these interactions has been investigated through a CSD search and subsequent analysis of the reported crystalline compounds. The results show that halogens become reasonably good hydrogen-bond acceptors when bonded to boron and, in this respect, are comparable in strength to metal-bound halogens.
authors.affiliation: Institut de Ciència de Materials de Barcelona (CSIC), Campus U.A.B., 08193 Bellaterra, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Giner Planas
authors.forename: Francesc
authors.initials: F
authors.lastname: Teixidor
authors.forename: Clara
authors.initials: C
authors.lastname: Viñas
authors.forename: Mark E
authors.initials: ME
authors.lastname: Light
authors.forename: Michael B
authors.initials: MB
authors.lastname: Hursthouse
mesh_terms: D001895:Boron / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D011166:Porphyrins / Q000737:chemistry*; D000098851:Carboranes
chemical_list: D001895:Boron; D011166:Porphyrins; C515487:cobaltacarborane; D000098851:Carboranes