Tertiary phosphine adducts of alane and gallane

Fiona M. Elms, Michael G. Gardiner, George A. Koutsantonis, Colin L. Raston, Jerry L. Atwood, Kerry D. Robinson

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Abstract

Thermally stable mono-tri-t-butylphosphine adducts of alane and gallane, H3MptBu3 (M Al, 1; M Ga, 2) and the gallane rich adducts of 1,2-bis(diisopropylphosphino)ethane and 1,2-bis(diphenylphosphino)ethane, [(H3Ga)2{(PR2CH2)2}] (R iPr, 3; R Ph, 4), have been prepared from LiMH4/HCI/phosphine; reactions involving H3MNMe3/PtBu3 also yield 1 and 2, for the former via a mixed donor tBu3PAl(H)3NMe3 (5), which decomposes to 1 and NMe3 at ca. 40°C; compounds 1 and 2, and the previously reported alane analogue of 3, viz. [(H3Al)2{(PiPr2CH2)2}] (6) have been shown to be four coordinate (Al-P, 2.471(3) and 2.451(3) Å, 1 and 6; Ga-P 2.444(6) Å 2). Ab initio calculations on relevant model systems, H3GaPMe3 (DZP level) and H3Al(PR3)2 (R H or Me; D95* level) are reported, Ga-P 2.550 Å, and Al-P 2.828 Å (R H), 2.786 Å (R Me).

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalJOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume449
Issue number1-2
DOIs
Publication statusPublished - 4 May 1993
Externally publishedYes

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    Elms, F. M., Gardiner, M. G., Koutsantonis, G. A., Raston, C. L., Atwood, J. L., & Robinson, K. D. (1993). Tertiary phosphine adducts of alane and gallane. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 449(1-2), 45-52. https://doi.org/10.1016/0022-328X(93)80105-K