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SYNTHESIS, MOLECULAR STRUCTURE, AND NUCLEAR MAGNETIC RESONANCE INVESTIGATION OF THE PLATINANONABORANE AND DIPLATINADECABORANE CLUSTER COMPOUNDS. AND

DOI: 10.1039/DT9810001415

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1415 - 1429 (1981)

Update date:2022-08-31

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Authors:

Boocock, Simon K.Boocock, Simon K.

Greenwood, Norman N.Greenwood, Norman N.

Hails, Michael J.Hails, Michael J.

Kennedy, John D.Kennedy, John D.

McDonald, Walter S.McDonald, Walter S.

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Article abstract of DOI:10.1039/DT9810001415

The reaction of cis- with an excess of - gives 4,4-bis(dimethylphenylphosphine)-arachno-4-platinanonaborane, <4,4-(PMe2Ph)2-4-PtB8H12>, (I), in high yield.The pale yellow crystals are monoclinic, space group C2/c, with a = 1.9771(8), b = 1.3025(4), c = 1.9773(4) nm, β = 110.99(3) deg, Z = 8, and the molecular structure is that of a nine-vertex arachno-platinanonaborane in which the B8 unit shows trihaptobonding to the metal centre.The compound is also formed in lower yield from several other polyhedral borane derivatives.The 14-vertex bis(dimethylphenylphosphine)bis-μ-(2-4-η-nido-hexaboranyl)-diplatinum(Pt-Pt), , is also formed in moderate yield from the - reaction, and this offers the most convenient route yet established for preparation.Treatment of (I) with KOH followed by cis- gives the very stable diplatinum compound 6,6,9,9-tetrakis(dimethylphenylphosphine)-arachno-6,9-diplatinadecaborane, <6,6,9,9-(PMe2Ph)4-6,9-Pt2B8H10>, (II).The colourless crystals are monoclinic, space group C2/c, with a = 1.3762(3), b = 1.5105(4), c = 1.9210(3) nm, β = 92.59(2) deg, and Z = 4; the molecular structure is that of an arachno-diplatina-decaborane anion 2-.The 1H, 11B, 31P, and 195Pt n.m.r. behaviour of both title compounds has been investigatedin detail using both single and double resonance techniques, and a number of important structural correlations emerge.

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Product name:((C6H5)(CH3)2P)4Pt2B8H10

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