TY - JOUR
T1 - Metallaborane chemistry. Part 10. Insertion of zerovalent platinum species into bridging boron-hydrogen-boron bonds of 2,3-dicarba-nido-hexaborane(8), 2,3-dimethyl-2,3-dicarba-nido-hexaborane(8), and monocarba-nido-hexaborane(9); Molecular and crystal structure of [nido-μ4,5-{trans-(Et3P)2Pt(H)}-μ 5,6-H-2,3-C2B4H6]
AU - Barker, Geoffrey K.
AU - Green, Michael
AU - Stone, F. Gordon A.
AU - Welch, Alan J.
AU - Onak, Thomas P.
AU - Siwapanyoyos, Gowit
PY - 1979
Y1 - 1979
N2 - Reaction of [Pt2(μ-cod)(PEt3)4] (cod = cyclo-octa-1,5-diene) with 2,3-dicarba-nido-hexaborane(8), 2,3-dimethyl-2,3-dicarba-nido-hexaborane(8), and monocarba-nido-hexaborane(9) affords respectively, [nido-μ4,5-{trans(Et3P)2Pt(H)}-μ 5,6-H-2,3-CB5H6], [nido-μ4,5-{trans-(Et3P)2Pt(H)}-μ 5,6-H-2,3-Me2-2,3-C2B4H 4], and [nido-μ4,5-{trans-(Et3P)2Pt(H)}-(μ 3,4-H) (μ5,6-H)-2-CB5H6]. The molecular structure of [nido-μ4,5-{trans-(Et3P)2Pt(H)}-μ 5,6-H-2,3-C2B4H6] has been established by a single-crystal X-ray diffraction study. Four molecules crystallise in the monoclinic space group P21/m with cell dimensions a = 10.970(4), b = 11.587(3), c = 9.459(3) Å, and β = 114.47(2)°. The molecular structure has been elucidated by the analysis of 5 106 diffractometer-measured reflection intensities, and refined by least squares to R 0.043. The cage core atoms of the molecule maintain a nido pentagonal-pyramidal geometry, with adjacent facial carbon atoms. Both pentagonal B-B links are bridged, one by hydrogen and the other by a trans-(Et3P)2Pt(H) fragment, the latter demonstrating insertion by the metal nucleophile into a bridging B2H function of the nido-carbaboranes. All cage hydrogen atoms have been located and positionally refined. The 1H, 11B, and 31P n.m.r. spectra of the new compounds have been recorded, and the results are discussed in terms of the molecular structures of the carbaplatinaboranes.
AB - Reaction of [Pt2(μ-cod)(PEt3)4] (cod = cyclo-octa-1,5-diene) with 2,3-dicarba-nido-hexaborane(8), 2,3-dimethyl-2,3-dicarba-nido-hexaborane(8), and monocarba-nido-hexaborane(9) affords respectively, [nido-μ4,5-{trans(Et3P)2Pt(H)}-μ 5,6-H-2,3-CB5H6], [nido-μ4,5-{trans-(Et3P)2Pt(H)}-μ 5,6-H-2,3-Me2-2,3-C2B4H 4], and [nido-μ4,5-{trans-(Et3P)2Pt(H)}-(μ 3,4-H) (μ5,6-H)-2-CB5H6]. The molecular structure of [nido-μ4,5-{trans-(Et3P)2Pt(H)}-μ 5,6-H-2,3-C2B4H6] has been established by a single-crystal X-ray diffraction study. Four molecules crystallise in the monoclinic space group P21/m with cell dimensions a = 10.970(4), b = 11.587(3), c = 9.459(3) Å, and β = 114.47(2)°. The molecular structure has been elucidated by the analysis of 5 106 diffractometer-measured reflection intensities, and refined by least squares to R 0.043. The cage core atoms of the molecule maintain a nido pentagonal-pyramidal geometry, with adjacent facial carbon atoms. Both pentagonal B-B links are bridged, one by hydrogen and the other by a trans-(Et3P)2Pt(H) fragment, the latter demonstrating insertion by the metal nucleophile into a bridging B2H function of the nido-carbaboranes. All cage hydrogen atoms have been located and positionally refined. The 1H, 11B, and 31P n.m.r. spectra of the new compounds have been recorded, and the results are discussed in terms of the molecular structures of the carbaplatinaboranes.
UR - http://www.scopus.com/inward/record.url?scp=37049109670&partnerID=8YFLogxK
U2 - 10.1039/DT9790001687
DO - 10.1039/DT9790001687
M3 - Article
AN - SCOPUS:37049109670
SN - 1472-7773
SP - 1687
EP - 1692
JO - Journal of the Chemical Society, Dalton Transactions
JF - Journal of the Chemical Society, Dalton Transactions
IS - 11
ER -