Abstract
The reaction of the nona-osmium cluster dianion [(Ph3P)2N]2[Os9(CO)24] with the electrophilic gold reagents "AuPR+3" and "Au2L2+" (where R = Ph (2a, 3a), Cy (2b, 3b) and L = bis-(diphenylphosphino)methane (DPPM) (1a) or 1,2-bis-(diphenyl)ethane (DPPE) (1b)) has been studied. The monogold fragment reacts to give both the mono- and di-substituted products [(Ph3P)2N][Os9(CO)24{Au(PR 3)}2] and [Os9(CO)24{Au(PR3)}2]. The structure of the latter cluster (R = Cy (2b)) has been determined by a single crystal X-ray diffraction analysis and a major rearrangement of the metal core geometry was found to have occurred on coordination of the gold fragments. In contrast, reaction with the digold reagent "Au2L2+" results in the isolation of only one product of formulation [Os9(CO)23(Au2L)], where coordination of the heteroatom moiety has been accompanied with the loss of a carbonyl ligand. From a single crystal X-ray diffraction analysis (L = DPPE (1b)) this compound was shown to have retained its original cluster geometry, with the gold atoms coordinated in close proximity to each other.
Original language | English |
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Pages (from-to) | 131-139 |
Number of pages | 9 |
Journal | Journal of Organometallic Chemistry |
Volume | 550 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 15 Jan 1998 |
Keywords
- Cluster carbonyls
- Gold
- Osmium
- Phosphines
- X-ray structure
ASJC Scopus subject areas
- Biochemistry
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry