GOLD(I) COMPLEXES OF 1,2-DITERTIARY PHOSPHINO-O-CARBORANE LIGANDS: TWO-, THREE-, AND FOUR-CO-ORDINATION

DOI: 10.1039/DT9850001387

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1387 - 1390 (1985)

Update date:2022-09-26

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Authors:

Al-Baker, Salam

Hill, William E.

McAuliffe, Charles A.

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Article abstract of DOI:10.1039/DT9850001387

Ditertiary phosphines (L) of the type R2P(C2B10H10)PR'2 (R = R, = Ph; R = R' = NMe2; R = Ph, R' = NMe2) react with tetraethylammonium dibromoaurate(I) to form three-co-ordinate complexes , which have been isolated and characterized by elemental analyses, and i.r. and 31P-<1H> n.m.r. spectroscopy.A dimeric two-co-ordinate complex, <(AuBr)2>, has also been isolated and characterized.The 31P-<1H> n.m.r. spectra of CD3COCD3-CH2Cl2 (1:1) solutions of L and ^- show evidence for the formation of dimeric two-co-ordinate <(AuBr)2L>, dimeric three-co-ordinate <(AuBr)2L2>, monomeric three-co-ordinate , and four-co-ordinate Br complexes.The unusual four-co-ordinate mixed-ligand complex -<(Me2N)2P(C2B10H10)P(NMe2)2>>Br is also observed.Phosphorus-phosphorus coupling constants decrease from three-co-ordinate to four-co-ordinate gold(I) complexes, as expected.The tertiary phosphine H(C2B10H10)PPh2 also gives > two-co-ordinate complexes.

Full text of DOI:10.1039/DT9850001387

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