97999-96-7

Upstream product

• 16872-09-6 1,2-dicarba-closo-dodecaborane⁽¹²⁾ 
• 644-97-3 Dichlorophenylphosphine 
• 22220-85-5 1,2-dilithio-o-carborane 
• 66953-84-2 rac-1,2-bis(phenylchlorophosphino)-1,2-dicarba-closo-dodecaborane⁽¹²⁾ 

Relevant academic research and scientific papers

Procedure for the degradation of 1,2-(PR2)2-1,2-dicarba-closo-dodecaborane(12) and 1-(PR2)-2-R'-1,2-dicarba-closo-dodecaborane(12)

Monophosphines and bisphosphines bearing anionic groups derived from the7,8-dicarba-nido-undecaborate unit, such as [7-PR2-8-Me-7,8-C2B9H10](-) and [7,8-(PR2)2-7,8-C2B9H10](-) (R = phenyl, ethyl, isopropyl or ethoxy ), were synthesized from closo-carborane precursors 1-PR2-2-Me-1,2-C2B10H10 and 1,2-(PR2)2-1,2-C2B10H10, respectively. In general, the C(c)-P bond in the closo species is very susceptible degradation reactions, producing C(c)-P cleavage and yielding the [7,8-C2B9H10]2(-) anion. Good degradation conditions which retain the C(c)-P found are toluene with a carborane-to-piperidine ratio of 1:50 and ethanol with carborane-to-piperidine ratio of 1:10. The aryl phosphines keep the C(c)-P bond best and produce the highest yields. Phosphites also retain the C(c)-P bond, but the phosphorus becomes positive and produces a zwitterionic species. Alkylphosphines are intermediate, depending on the bulk and nature of the R group in the -PR2 unit. The crystal structure of [NMe4][7,8-(PPh2)2-7,8-C2B9H10].CH3CH2OH is described.

Chemistry of decaborane-phosphorus compounds. IV. Monomeric, oligomeric, and cyclic phosphinocarboranes

Dilithiocarborane, B10H10C2Li2, was allowed to react with chlorophosphines containing one, two, and three chlorine atoms. (C6H5)2PCl and C6H5PCl2 gave the expected disubstituted compounds, B10H10C2[P(C6H5) 2]2 and B10H10C2(C6H 5P·Cl)2, respectively. B10H10C2Li2 and PCl3, however, formed a compound having two phosphorus atoms and two carborane nuclei in a six-membered ring. This unique ring system also arose from the reaction of B10H10C2Li2 with B10H10C2(C6H 5P·Cl)2. Subsequent reactions of such molecules with ammonia and NaN3 are described. The cyclic bis-azide, (B10H10C2P·N3)2. and p-[(C6H5)2P]2C6H 4 reacted to form a PNP bonded oligomer.