Abstract
AbstractThe group 13–15 element addition compounds tBu2PH·EX3 (E = B, Al, Ga, In; X = Cl, Br) are accessible from the reaction of tBu2PH with the triel halides EX3 (E = B, Al, Ga, In; X = Cl, Br) at room temperature. The crystal structures of the group 13–15 element addition compounds tBu2PH·BBr3 (monoclinic, P21/c) and tBu2PH·EBr3 (E = B, Al, Ga, In) (monoclinic, P21/n) are described. When the addition compound tBu2PH·BBr3 was treated with one equivalent of LiN(SiMe3)2, the reaction led to the formation of the cyclophosphinoborane (tBu2PBBr2)2. The structure of (tBu2PBBr2)2 (monoclinic, C2/m) displays a four‐membered P2B2 ring whereas the cyclophosphinoalane (Ph2PAlMe2)3 which was obtained from Ph2PH and AlMe3 has a six‐membered P3Al3 ring structure (monoclinic, P21/c). In addition, we report the result of the X‐ray structure analysis of the oxidation product of tBu2PH·BBr3, the phosphane oxide adduct tBu2PHO·GaBr3 (orthorhombic, Pnma) and of the phosphonium salt [tBu2PH2]+[GaBr4]– (monoclinic, P21/n).
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