Beiträge zur Chemie des Bors, 215. Darstellung und Reaktionen monomerer Tetraorganylphosphanylborane
作者： Heinrich Nöth , Siegfried Staude , Martina Thomann , Robert T. Paine
关键词: Trimethylsilyl 、 Molecule 、 Crystal structure 、 Bicyclic molecule 、 X-ray crystallography 、 Medicinal chemistry 、 Chemistry 、 Ring (chemistry) 、 Monomer 、 Stereochemistry 、 Lithium
摘要: Contributions to the Chemistry of Boron, 215[1]. – Synthesis and Reactions Monomeric Tetraorganyl-phosphanyl-boranes The reaction diorganyl-chloroboranes with lithium diorganyl-or bis(trimethylsilyl)phosphides leads monomeric phosphanylboranes tBu2BPtBu2 (1), tBu2BP(SiMe3)2 (2), 9-BBNPtBu2 (3), 9-BBNP(SiMe3)2 (4), Cy2BPtBu2 (5). These species were studied by NMR-spectroscopic methods. For further characterization reactions compounds 1, 3, 5 have been investigated. Heating 1 results in formation dimeric tBu(H)BPtBu2 (8) Cy(H)BPtBu2 (9) dehydroboration. Dimers 8 9 are present as cis- trans1-isomers confirmed X-ray structure analyses. The trans1-isomer shows a planar (BP)2 four-membered ring, whereas ring cis1-isomer is slightly folded. Furthermore, 3 9H-9-BBN yields (μ1-H)(μ-tBu2P)[9-BBN]2 (14), whose bridged proven crystal analysis. Oxidation phosphorus atom sulfur S1-boryl thiophosphinate tBu2(S)PS-9-BBN (16).
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