Triphenylphosphine Dibromide

Reactivity of Mononuclear and Dinuclear Gold(I) Amidinate Complexes with CS2 and CsBr3

“…Indeed, reaction of 1 with CsBr3 is accompanied by a color change to red-brown; however, upon workup the 1 H NMR spectrum revealed the presence of the dinuclear Au(I) amidinate, Au2[(2,6-Me2C6H3N)2C(H)]2, 3, as well as resonances consistent with Ph3PBr2, Equation (4). Further, the 31 P NMR spectrum also confirmed the phosphorus-based product as Ph3PBr2 [30]. The red-brown color may be due to the possible formation of Au2[(2,6-Me2C6H3N2)C(H)]2(Br)2 which has been previously reported [5].…”

Ultrasonic-assisted synthesis of carbodiimides from N,N′-disubstituted thioureas and ureas

“…Particularly, triphenylphosphine (Ph 3 P) has been used along with carbon tetrachloride [8,23,24], carbon tetrabromide [25][26][27], diethyl azodicarboxylate [16], or bromine [7,28,29] in the synthesis of carbodiimides from N,N 0 -disubstituted ureas or thioureas. In several cases, triphenylphosphine dibromide has been used directly in the dehydration of a number of functionalized ureas [7,[30][31][32][33][34][35][36]. However, the reagent has to be freshly prepared and extra-dry conditions are required to achieve good conversion.…”