An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

The reactions proceeding in air between Cu-I/Cu-II and phen and influence of the closo-decaborate anion on the reaction path are studied. In the absence of [B10H10](2), a rapid redox reaction between CuCl and phen yields [Cu-2(II)(phen)(4)(mu-CO3)]Cl-2 (2). The [B10H10](2) anion produces a decelerating effect on the redox reaction. It stabilizes the +1 oxidation state of copper and coordinates two metal atoms by apical faces to form [Cu-2(I)(phen)(2)[B10H10]] (3). Heating of the reaction mixture results in [Cu-I(phen)(2)](2)[B10H10] (4) and [Cu-I(phen)(2)](2)[Cu-II(phen)(3)][B10H10](2) (5) indicating that a part of copper atoms is oxidized and the borohydride ligand is replaced by phen molecules in the inner sphere of the metal. Compounds [Cu-2(II)(phen)(4)(mu-CO3)][B10H10] (1) and [Cu(phen)(2)][B10H10] (6) are prepared starting from Cu-II-phen complexes. Compounds 1-6 are identified by IR spectroscopy, elemental analysis, and X-ray diffraction. (C) 2015 Elsevier B.V. All rights reserved.

Reaction of [Cu2B10H10] with 2,2'-bipyridylamine (bpa) in acetonitrile was studied. A redox reaction was found to proceed in reaction solution at ambient temperature. Copper coordination compounds with the metal of different oxidation states-[Cu (2) (I) (bpa)(2)B10H10] center dot 2NCCH(3), [Cu (4) (II) (bpa)(4)(OH)(4)][Cu (2) (I) (B10H10)(3)] center dot nNCCH(3), [Cu-II(bpa)(2)(NCCH3)(2)](2-B(10)H(9)bpa)(2) center dot 2H(2)O, [Cu (2) (II) (bpa)(2)(OH)(2)B10H10], and [(Cu (2) (II) (bpa)(2)(CO3)(2)] center dot H2O-were isolated under various reaction conditions. The compounds were characterized by IR spectroscopy, X-ray crystallography, and elemental analysis.

A redox reaction that occurs in the [Cu 2 B 10 H 10 ]/Phen system in CH 3 CN/DMSO and CH 3 CN/DMF in air yields a Cu(II) binuclear complex, [(Phen) 2 Cu(CO 3 )Cu(Phen) 2 ] 2+ . The [Cu 2 (Phen) 4 (μ-CO 3 )]B 10 H 10 · 2.5DMSO · 2H 2 O ( I ) and [Cu 2 (Phen) 4 (μ-CO 3 )]B 10 H 10 · 4DMF ( II ) compounds have been isolated and studied by X-ray crystallography at 150 K and EPR at 295 K. Their magnetic properties have been studied in the range 300–2 K. In the cations of both compounds, the bridging CO 3 2− group is bidentately coordinated to two Cu atoms. The cations in I and II have different spatial orientations of the Cu-O bonds: anti-syn and anti-anti , respectively. Compound I has weak magnetic interactions caused by a short Cu…Cu distance (4.441 Å) in the dimer. No exchange coupling is observed in II .

The complexation reactions of CuI with the B10H10 2− anion and its protonated form, the B10H11 − anion, were studied in the presence of phenanthridine (9Nphen). Depending on the reaction conditions, positional isomers of the monomeric copper(i) complex [Cu2(9Nphen)4B10H10] were selectively isolated. The closo-decaborate anion in the complexes is coordinated to the Cu(i) atoms through the apical edges 1–2, 7(8)–10 or 1–2, 1–4 via the formation of multicenter CuHB bonds. The crystal structures and IR spectra of the complexes were studied. The compound [Cu2(9Nphen)4B10H10] is the first monomeric complex isolated in the form of the 1–2, 7(8)–10 isomer. It extends the series of positional isomers, which we have described earlier.