Synthesis and reactivity of low valent transition metal alkoxides and related compounds /
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1988.
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| Subjects: | |
| Online Access: | ProQuest, Abstract Link to OAKTrust copy |
| Abstract: | Low valent transition metal alkoxide complexes nave been proposed as catalysts in a number of important reaction processes. Most of the research in this area has concentrated on alkoxide complexes of the late transition metals, particularly palladium, platinum, and copper. Few examples of isolated and well characterized alkoxide complexes of the zero valent group 6 metals, Cr, Mo, and W, have been reported in the literature; many of these are polynuclear. The primary goals of these investigations were 1) to prepare and isolate zero valent mononuclear metal carbonyl alkoxide complexes of the group 6 metals; 2) to examine the reactivity of the mononuclear metal alkoxides, including the determination of their roles in the formation of polynuclear metal alkoxides; and 3) to prepare complexes related to the metal alkoxides, specifically, metal thiolates, and to examine their reactivity in relation to the metal alkoxides. The preparation of the complexes, Et4N+ M(CO)5 OR- (M = Cr, Mo, W; R = Ph, C6H4CH3-m), is reported. These complexes have been found to be very unstable due to the extreme CO lability of the carbonyl ligands cis to the alkoxide group. Only the tungsten derivatives have been isolated. We report the X-ray crystal structure of [Et4N[[W(CO)5OPh]. The liability of the carbonyl ligands cis to the alkoxide groups in the complexes, Et4N+ M(CO)5OR-, has been examined by phosphine substitution reactions (M = Cr, W; R = Ph), as well as aggregation following loss of carbonyl ligands. In the absence of added ligands, aggregation of unsaturated M(CO)[n]OR- (n = 3,4) produces dinuclear complexes... |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Chemistry." |
| Physical Description: | xvi, 257 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |