Akademik Veri Yönetim Sistemi
INORGANIC CHEMISTRY COMMUNICATIONS, cilt.61, ss.214-216, 2015 (SCI-Expanded)
New monocyclic 1,4-diaza-2,3-diborine derivatives 3ad, 3ae and 3bc and bicyclic 1,4-diaza-2,3-diborine 8a were prepared by reacting 1,4-diaza-2,3-diene dianion (5) with 1,2-dichlorodiborane (6) and 1,2-dichloro-1,2-diborolane (7). The structures of these new derivatives, which are likely ligands for metal complexes, have been characterized by nuclear magnetic resonance (NMR). The crystal structures of lad and 3bc have been determined by single crystal X-ray diffraction technique. In the crystal structure of 3ad, the asymmetric unit contains one-half of the molecule, with the other half generated by (x,y,3/2-z) symmetry operation. Considering the X-ray crystallographic results of these compounds, the B-B bonds are typical for single bonds, with the bond lengths of 1.700 and 1.697 angstrom. Optimized geometric results and Natural Bond Orbital analysis also endorsed that these bond types are single bonds. In 3ad, diazadiborine ring is almost planar, while this ring is in half-chair conformation in 3bc. These compounds, although many aminoboranes are stable in air, were observed not to be stable in air. They have also shown non-aromatic characteristics. (C) 2015 Elsevier B.V. All rights reserved.