Synthesis and Structures of Lead(II) Complexes with Substituted Derivatives of the -Decaborate Anion with a Pendant N Group.

In this work, we studied lead(II) and cobalt(II) complexation of derivatives [2-BHO(CH)O(CH)N] and [2-BHO(CH)N] of the -decaborate anion containing pendant azido groups in the presence of 1,10-phenanthroline and 2,2'-bipyridyl. Mononuclear [PbL{An}] and binuclear [PbL(NO){An}] lead complexes (where {An} is the N-substituted boron cluster) were isolated and studied by IR spectroscopy and elemental analysis. The mononuclear lead(II) complex [Pb(phen)[BHO(CH)O(CH)N] and the binuclear lead(II) complex [Pb(phen)(NO)[BHO(CH))N] were determined by single-crystal X-ray diffraction.

Composites and Materials Prepared from Boron Cluster Anions and Carboranes.

Here, we present composites and materials that can be prepared starting with boron hydride cluster compounds (decaborane, decahydro--decaborate and dodecahydro--dodecaborate anions and carboranes). Recent examples of their utilization as boron protective coatings including using them to synthesize boron carbide, boron nitride, metal borides, metal-containing composites, and neutron shielding materials are discussed. The data are generalized demonstrate the versatile application of materials based on boron cluster anions and carboranes in various fields.

A New Approach to the Synthesis of Nanocrystalline Cobalt Boride in the Course of the Thermal Decomposition of Cobalt Complexes [Co(DMF)] with Boron Cluster Anions.

In the course of the study, nanocrystalline cobalt monoboride was prepared by thermal decomposition of precursors [Co(DMF)][An], where [An] = [BH] (), [-BH] () or [BCl] () in an argon atmosphere. Three new salt-like compounds - were prepared when Co(NO) was allowed to react with (EtNH)[An]. Compound is new; the structures of compounds and have been previously reported.

New type of RNA virus replication inhibitor based on decahydro-closo-decaborate anion containing amino acid ester pendant group.

In this work, a synthetic approach to prepare an example of new class of the derivatives of the closo-decaborate anion with amino acids detached from the boron cluster by pendant group has been proposed and implemented. Compound Na[BH-O(CH)C(O)-His-OMe] was isolated and characterized. This compound has an inorganic hydrophobic core which is the 10-vertex boron cage and the -O(CH)C(O)-His-OMe organic substituent.

Solvent-Induced Encapsulation of Cobalt(II) Ion by a Boron-Capped tris-Pyrazoloximate.

Boron-cross-linked cobalt(II) pseudoclathrochelate was obtained by the template reaction of 2-acetylpyrazoloxime, phenylboronic acid, and a new DMF cobalt(II) solvato complex with a decachloro--decaborate dianion. As confirmed by single-crystal X-ray diffraction, this complex crystallizes with two symmetry-independent cobalt(II) pseudoclathrochelate cations, one decachloro--decaborate dianion, one benzene, one dichloromethane solvent molecule, and two molecules of DMF. The latter act as pseudocapping fragments to the monocapped tris-pyrazoloximate ligands by forming N-H···O hydrogen bonds with their pyrazole groups.

Solid-State Reactions of Eicosaborate [B H ] Salts and Complexes.

A series of salts and complexes containing trans- and iso-isomers of octadecahydro-eicosaborate [B H ] dianion is synthesized and characterized using FTIR and B NMR spectroscopies and X-ray diffraction techniques. Both isomers are found to act as four-, bi-, or zero-dentate ligands in reactions with copper(II), silver(I), and lead(II) through apical and/or equatorial boron atoms. Solid-state photo- and thermoinitiated reactions of octadecahydro-eicosaborate isomerization and solvent cleavage occurring in these compounds in a single-crystal-to-single-crystal manner are studied in situ.

Theoretical QTAIM, ELI-D, and Hirshfeld surface analysis of the Cu-(H)B interaction in [Cu2(bipy)2B10H10].

Interaction of [Cu2B10H10] with 2,2'-bipyridine (bipy) afforded a novel binuclear discrete complex of the [Cu2(bipy)2B10H10] composition. Two copper(I) atoms coordinate a bridge boron cage through an apical edge and a triangular BBB face situated at its opposite apical vertices to form four 3c2e (CuHB) and one 2c2e Cu-B bonds. The charge density model was obtained by density functional theory calculations of isolated molecule and crystal.