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Triphenylphosphonium cyclopropylide is converted into the corresponding 1-H- or 1-D-cyclopropylphosphonium bromide in the reaction with HBr or DBr, respectively. With methyl iodide, the 1-methyl-cyclopropylphosphonium iodide is generated. Addition of BH 3  (as THF - BH 3 ) yields trihydrido-(1-triplienylphosphoniocyclopropyl)borate - (CH 3 ) 3 Al and (C 2 H 5 ) 3 Ga also give 1:1 adducts, the metal center being attached again to C-1 of the cyclopropyl ring. - Complexes of AuCl, however, are easily transformed into ionic 1:2 complexes, irrespective of the ratio of the reactants employed. Au(I) is twocoordinate in those complexes with two intact cyclopropylides as the sole ligands. - NMR data of all the new materials are presented

zeitschrift für naturforschung b

Derivate und Koordinationsverbindungen des Triphenylphosphoniumcyclopropylids (C 6 H 5 ) 3 P =C(CH 2 ) 2  / Derivatives and Coordination Compounds of Triphenylphosphonium Cyclopropylide (C 6 H 5 ) 3 P =C(CH 2 ) 2