Synthesis of [7,8-(PPh2)2-7,8-C2B9H10]-: a ligand analogous to 1,2-bis(diphenylphosphino)ethane with a "built-in" negative charge

Two New closo- or nido-Carborane Diphosphine Complexes: Synthesis, Characterization and Crystal Structures

“…The partial degradation of the closo diphosphine ligand 1,2-(PPh 2 ) 2 -1,2-C 2 B 10 H 10 by metal complex driven has been first disclosed by Teixidor's group, 6 and based on this method, many neutral complexes of the nido- The strong polarity solvent can make the closo skeleton of the carborane cage be degraded to nido form, while the closo skeleton can be retained when weak polarity solvent was used in the reaction. Based on these results, we investigated the reactions of 1,2-(PPh 2 ) 2 -1,2-C 2 B 10 H 10 HgCl 2 in CH 3 CN and 1,2-(P .…”

N,O-Type Carborane-Based Materials

“…Overall, complex 22 represents an interesting class of multifunctional molecular materials that combine magnetic, chiroptical and second-order optical properties. [62][63][64][65][66]. The phenomenon is attributed to the electron density being withdrawn from the boron cluster upon metal complexation.…”

“…Under such conditions, the o-carborane ligands 2b-c were deboronated to the corresponding 7,8-nido-carboran-7-yl)pyridylmethanol complexes 25b-c. Deboronation was not observed in any of the m-or p-carborane derivatives, consistent with their higher stability. The deboronation of o-carborane-containing ligands is known to be enhanced when coordinated to metal centers [62][63][64][65][66]. The phenomenon is attributed to the electron density being withdrawn from the boron cluster upon metal complexation.…”

Synthesis and Crystal Structure of Three Carborane Complexes, [M{7,8‐(OPPh2)2‐7,8‐C2B9H10}2] (M = Cu, Zn) and [Ni(thf){7,8‐(OPPh2)2‐7,8‐C2B9H10}2]·thf, and Two Carborane Compounds, 1‐(OPPh2)‐2‐(PPh2)‐1,2‐C2B10H10 and H[7,8‐(OPPh2)2‐7,8‐C2B9H10]·0.25C2H5

“…-2.2 ppm is the bridging H atom of B-H-B in the three complexes. [19] In the 13 C NMR spectra (100.63 MHz), the resonance at about 132-139 ppm can be assigned to the benzene-ring C atoms, and that at ca. δ = 77 can be attributed to the carbon atom of carborane cage.…”

“…Up to now, complexes containing the 1,2-(PPh 2 ) 2 -1,2-C 2 B 10 H 10 and nido- [7,8- [19] Ru II , [20] Ag I , [21,22] Au I , [23][24][25][26][27][28][29] Pd II , [30][31][32][33] and Rh [34] have been reported and characterized by single-crystal X-ray diffraction. We are also interested in these kinds of complexes and have reported on the synthesis and crystal structures of Cu I , [35] Au I , [36] Ni II , Pd II , and Pt II complexes, [37] and we investi-and 13 C NMR spectroscopy, and single-crystal X-ray diffraction.…”