In:
Israel Journal of Chemistry, Wiley, Vol. 30, No. 4 ( 1990-01), p. 369-376
Abstract:
The synthesis and characterization of two tungsten carbonyl dimers containing bridging alkoxide or aryloxide ligands are described. The crystal and molecular structures of [PPN] 2 [W 2 (CO) 8 (OCH 2 CF 3 ) 2 ], 1, and [Et 4 N] 3 [W 2 (CO) 6 ‐(OPh) 3 ]‐CH 3 CN, 2 , are reported and compared with the structures of tetranuclear tungsten derivatives previously described. The dimer 1 crystalizes in the triclinic space group P 1 with unit cell parameters a = 13.460(11) Å, b = 12.318(5) Å, c = 13.842(10) Å, α = 82.73(5)°, β = 59.11(5)°, γ= 80.09(5)°, V = 1938(2) Å 3 , and Z = 1. The complex 2 crystalizes in the monoclinic space group P 2 1 / n with unit cell parameters a = 11.954(2) Å, b = 19.359(4) Å, c = 26.462(5) Å, β = 102.50(16)°, V = 5979(2) Å 3 , Z = 4. Molecular modeling software was utilized to construct a tetranuclear derivative from 1 similar to the structurally characterized [W(CO) 3 OH] 4− 4 tetramer. The two tetramers were found to possess similar molecular parameters. This supports the contention that dimers of type 1 are the precursors of the tetramers. Comparisons of the tungsten alkoxides and aryloxides with the behavior of W(CO) 6 on γ‐alumina are provided.
Type of Medium:
Online Resource
ISSN:
0021-2148
,
1869-5868
DOI:
10.1002/ijch.199000039
Language:
English
Publisher:
Wiley
Publication Date:
1990
detail.hit.zdb_id:
2066481-3
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