title: New syntheses and structural characterization of NH3BH2Cl and (BH2NH2)3 and thermal decomposition behavior of NH3BH2Cl.
abstract: New convenient procedures for the preparation of ammonia monochloroborane (NH(3)BH(2)Cl) and cyclotriborazane [(BH(2)NH(2))(3)] are described. Crystal structures have been determined by single-crystal X-ray diffraction. Strong H···Cl···H bifurcated hydrogen bonding and weak N-H···H dihydrogen bonding are observed in the crystal structure of ammonia monochloroborane. When heated at 50 °C or under vacuum, ammonia monochloroborane decomposes to (NH(2)BHCl)(x), which was characterized by NMR, elemental analysis, and powder X-ray diffraction. Redetermination of the crystal structure of cyclotriborazane at low temperature by single-crystal X-ray diffraction analysis provides accurate hydrogen positions. Similar to ammonia borane, cyclotriborazane shows extensive dihydrogen bonding of N-H···H and B-H···H bonds with H(δ+)···H(δ-) interactions in the range of 2.00-2.34 Å.
authors.affiliation: Department of Chemistry, The Ohio State University, Columbus, Ohio 43210, United States.
authors.forename: Hima K
authors.initials: HK
authors.lastname: Lingam
authors.forename: Cong
authors.initials: C
authors.lastname: Wang
authors.forename: Judith C
authors.initials: JC
authors.lastname: Gallucci
authors.forename: Xuenian
authors.initials: X
authors.lastname: Chen
authors.forename: Sheldon G
authors.initials: SG
authors.lastname: Shore