210905-08-1

Upstream product

• 16853-85-3 lithium aluminium tetrahydride 
• 66953-84-2 rac-1,2-bis(phenylchlorophosphino)-1,2-dicarba-closo-dodecaborane⁽¹²⁾ 

Relevant academic research and scientific papers

Synthesis, molecular structure and reactivity of the first secondary carbaboranylbisphosphine 1,2-bis (phenylphosphino)-1,2-dicarba-closododecaborane(12)

The reaction of a diastereomeric mixture of 1,2-bis(phenylchlorophosphino)-1,2-dicarba-closododecaborane(12) (1) with LiA1H4, followed by hydrolysis with H2O, gives a 4:1 mixture of rac- and meso-1,2-bis(phenylphosphino)-1,2-dicarba-closo-dodecaborane(12) (2a, b) or 1-phenylphosphino-1,2-dicarbacloso-dodecaborane(12) (3), depending on the stoichiometry employed. A mixture of 2a, b reacts with sulfur in undecane at 190°C or without solvent at 105-110°C to give exclusively the cyclic anhydride of 1,2-bis(phenylthiophosphoryl)-1,2-dicarba-closo-dodecaboranyl(12)- dithiodiphosphinic acid (6). 2, 3 and 6 were characterised spectroscopically (1H, 31P, 11B, 13C NMR, IR, MS) and X-ray structure determinations were carried out on the racemic isomers 2a and 6.