Coordinately unsaturated metal clusters. A neutron diffraction study of the crystal and molecular structure of the trimeric rhodium complex (HRh(P(OCH/sub 3/)/sub 3/)/sub 2/)/sub 3/

Journal Article · Fri Feb 01 00:00:00 EST 1980 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic50204a018· OSTI ID:5313678

Brown, R K ^[1]; Williams, J M; Sivak, A J; Muetterties, E L

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1. Argonne National Lab., IL

The molecular strcutre of (HRh(P(OCH/sub 3/)/sub 3/)/sub 2/)/sub 3/ has been determined by using neutron diffraction techniques (T = 110 K). The trimeric rhodium complex is monoclinic, space group P2/sub 1/(C/sub 2//sup 2/, No. 4), with a = 10.792 (6) A, b = 13.438 (8) A, c = 13.438 (8) A, ..beta.. = 91.64 (4)/sup 0/, V/sub c/ = 1948.02 A/sup 3/, and d/sub calcd/ = 1.801 g cm/sup -3/ for Z = 2. The neutral molecule consists of a triangular array of Rh atoms each bonded in an approximately square-planar fashion to two terminal P(OCH/sub 3/)/sub 3/ groups and two bridging hydride ligands. The Rh-Rh separations involving single hydrogen bridges are 2.803 (7), 2.780 (6), and 2.856 (8) A and the average Rh-H/sub b/ distance is 1.76 (3) A. The bridging Rh-H/sub b/ separations reported here are the first interactions to be characterized structurally with neutron crystallographic techniques (T = 110 K). A discussion of the origin of the structural distortion from planarity of the (HRhP/sub 2/)/sub 3/ cluster core is presented. 4 figures, 3 tables.

• OSTI ID: 5313678
• Journal Information: Inorg. Chem.; (United States), Vol. 19:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
RHODIUM COMPLEXES
CRYSTAL STRUCTURE
MOLECULAR STRUCTURE
STRUCTURAL CHEMICAL ANALYSIS
BINDING ENERGY
LIGANDS
NEUTRON DIFFRACTION
RHODIUM HYDRIDES
COHERENT SCATTERING
COMPLEXES
DIFFRACTION
ENERGY
HYDRIDES
HYDROGEN COMPOUNDS
RHODIUM COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties