Some copper(I) complexes of 1-diphenylphosphino-ortho-carborane

Synthesis and Reactivity of ortho-Carbaborane-Containing Chiral Aminohalophosphines

“…In 2a , 2b , 3b , and 5a , each phosphorus atom has pyramidal coordination by one nitrogen atom, one carbon atom of the carbaborane cluster, one chlorine atom, and the lone pair of electrons. The C−C bond length of the cluster ranges from 170.6 ( 2a ) to 174.7 pm ( 5a ) and is therefore in the same range as in similar compounds. , In general, the bond lengths and angles of 2a / b , 3b , and 5a show no remarkable deviations from comparable structures. Nevertheless, the P−Cl bond lengths in 2a / b , 3b , and 5a are longer by approximately 4 pm than those observed in rac -1,2-(PPhCl) 2 (C 2 B 10 H 10 ) (205.1(1) pm) and rac - and meso -1,2-(P t BuCl) 2 (C 2 B 10 H 10 ) (207.4(9)/207.0(8) and 207.0(9)/205.8(9) pm) .…”

“…While nonchiral bisphosphines of dicarba- closo- dodecaborane(12) were largely explored, only limited studies on chiral bidentate tertiary phosphine derivatives, in particular, chlorophosphino-substituted compounds, have been reported. Moreover, chiral derivatives with highly electronegative groups or NR 2 groups at phosphorus were hardly explored. , …”

Reactions and Coordination Properties of the First Secondary Carbaboranyldiphosphane: 1,2-Bis(phenylphosphanyl)-1,2-dicarba-closo-dodecaborane(12)

“…Due to the low solubility of 8, attempts to determine the molecular structure in solution were unsuccessful. A comparison with the CuCl complexes [CuCl{1,2-(PPh 2 ) 2 C 2 B 10 H 10 }] [18] and [CuCl{1-(PPh 2 )C 2 B 10 H 11 } 2 ] n [20] suggests an oligomeric structure.…”