ISSN:
1434-1948
Keywords:
Neutron diffraction
;
Donor-acceptor complex
;
Bridging hydride ligand
;
Rhenium
;
Chromium
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A neutron diffraction analysis was carried out at 120 K on a single crystal of [K(18-crown-6)][(PPh3)2ReH6Cr(CO)3] · THF in order to locate the hydride ligands. Three of the hydrides are bound terminally to the Re atom while the other three bridge the Re-Cr bond; the bridging hydrides are closer to the Re atom. This compound can be thought of as a donor-acceptor complex, with [(PPh3)2ReH6]- acting as the donor to the Cr(CO)3 fragment. Average distances and angles: Re-Cr = 2.58(1), Re-H(br) = 1.75(1), Cr-H(br) = 1.92(2), Re-H(t) = 1.69(1) Å; Re-H-Cr = 89.1(7)°. Final agreement factors: R(F) = 6.4% for 3443 reflections with I 〉 2σ(I), and R(F) = 8.3% for all data (4195 reflections).
Type of Medium:
Electronic Resource
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