Preparation, unusual spectral properties, and structural characterization of (terpyridien)(tetrahydroborato-H,H')cobalt

Journal Article · Fri Jan 01 04:00:00 EST 1982 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic00131a036· OSTI ID:5689838

Corey, E J; Cooper, N J; Canning, W M; Lipscomb, W N; Koetzle, T F

A new compound of cobalt possessing terpyridine and tetrahydroborato ligands has been prepared by reduction of (Co(terpy)Cl/sub 2/) with NaBH/sub 4/. Single-crystal x-ray and neutron diffraction studies have established the molecular structure of the compound. The coordination sphere of the cobalt can be described as a distorted tetragonal pyramid in which the apex and one basal vertex are occupied by bridging hyrides of the bis-chelate tetrahydroborato ligand. The infrared spectrum of the molecule displays features at variance with those anticipated for a complex with a bis-chelate tetrahydroborato ligand, and we suggest that caution should be exercised in the use of infrared spectroscopy for the structural characterization of tetrahydroborato complexes. Crystallographic details: C/sub 15/H/sub 15/N/sub 3/CoB, space group P2/sub 1//c, Z = 4, a = 8.173 (1) A, b = 15.802 (5) A, c = 10.708 (4) A, ..beta.. = 92.84 (2)/sup 0/ (T = 298 K); a = 8.038 (3) A, b = 15.701 (5) A, c = 10.593 (3) A, ..beta.. = 94.03 (3)/sup 0/ (T = 50/sup 0/K). Final R(F) values are 0.047 for 2718 x-ray reflections measured at 298/sup 0/K and 0.062 for 1497 neutron reflections measured at 50/sup 0/K.

• Research Organization: Harvard Univ., Cambridge, MA
• OSTI ID: 5689838
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 21:1; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METAL COMPOUNDS
AZINES
BOND ANGLE
BOND LENGTHS
BORON COMPOUNDS
BORON HYDRIDES
CHEMICAL PREPARATION
COBALT COMPLEXES
COHERENT SCATTERING
COMPLEXES
DATA
DIFFRACTION
DIMENSIONS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
LENGTH
LIGANDS
MOLECULAR STRUCTURE
NEUTRON DIFFRACTION
NUMERICAL DATA
ORGANIC BORON COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
SCATTERING
SODIUM COMPOUNDS
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TRANSITION ELEMENT COMPLEXES
X-RAY DIFFRACTION