In the title compound, [Bi(C(20)H(23)N)(CF(3)SO(3))], the Bi(III) ion shows a distorted pseudo-trigonal-bipyramidal geometry, with two C atoms and a lone electron pair of the Bi atom in equatorial positions and the N and O atoms at the apical positions. The cyclo-hexyl group is disordered over two orientations with site-occupancy factors of 0.600 (14) and 0.400 (14).

The crystal structures of the new isomorphous compounds iron(III) oxyfluorotellurate(IV), FeTeO(3)F, gallium(III) oxyfluorotellurate(IV), GaTeO(3)F, and chromium(III) oxyfluorotellurate(IV), CrTeO(3)F, consist of zigzag chains of MO(4)F(2) distorted octahedra alternately sharing O-O and F-F edges and connected via TeO(3) trigonal pyramids. A full O/F anionic ordering is observed and the electro...

In the title organometallic complex, [Sb(C(20)H(23)N)Cl], the central anti-mony-containing part of the complex exhibits a pseudo-trigonal-bipyramidal geometry, where two C atoms and a lone electron pair of the Sb atom exist at the equatorial positions, while the N and Cl atoms are located at the apical positions, and a transannular inter-action exists between the Sb and N atoms on 1,5-aza-stibo...

In the title compound, [PbBr(2)(C(14)H(12)N(2))](n), the Pb(II) atom lies on a twofold rotation axis. The N-heterocycle-chelated Pb(II) atom exists in a distorted octa-hedral geometry owing to two long Pb⋯Br inter-actions [2.9562 (5) and 3.2594 (5) Å]. These result in a zigzag chain running along the c axis. The lone pair is stereochemically inactive.

The oxidation potential of thioethers constrained to be near aromatic rings is lowered, due to an antibonding interaction between the p-type sulfur lone pair with the neighboring phenyl π-system which on removal of an electron becomes a new kind of 3-electron S∴π bonding that reveals itself in the photoelectron spectrum and by an electronic transition involving the orbitals participating in the...

Both independent Pb(II) atoms in the title compound, [Pb(2)(C(10)H(8)NO)(2)(C(2)H(3)O(2))(2)], are chelated by acetate and substituted quinolin-8-olate anions; the O atoms of the quinolin-8-olates also bridge to confer a five-coordinate status to each metal center. The geometry approximates a distorted Ψ-fac octa-hedron in which one of the sites is occupied by a stereochemically active lone pair.

By means of UV photoelectron spectroscopy (UPS) the electronic structures of [Fe^3.C3H5(CO)3X], [Fe^3-(2-CH3C3H4)(CO)3X] (X = Cl, Br, I) and [Co(C3H5)(CO)3] have been studied. Detailed assignments are possible and surprisingly low ionization energies (as low as 8.19 eV) are found for iodine lone pair type Orbitals. From the spectra a large difference in n backbonding is found between the cobalt...

In the title compound, C(23)H(31)NO(2), the lone pair on the nitro-gen atom is oriented to facilitate intra-molecular hydrogen bonding with the hydr-oxy group residing on the phenyl substituent. The five-membered ring adopts an envelope confornmation with the O atom at the flap. The absolute stereochemistry was verified by measurement of optical activity using a digital polarimeter.

The title compound, [Pb(C(6)F(5)S)(2)(C(5)H(5)N)(2)](n), shows the Pb(II) atom in a ψ-trigonal bipyramidal S(2)N(2) bonding environment. Pyridine N atoms occupy axial sites, while thiol-ate S atoms and a stereochemically active lone pair occupy equatorial sites. Very long inter-molecular Pb⋯S inter-actions [3.618 (4) and 3.614 (4) Å] yield a weakly associated one-dimensional polymeric structure...

Ring-stacked boranes of the B(10)H(10)(2)(-) and B(12)H(12)(2)(-) type, when substituted with lone pair bearing groups such as -O, -NH, and -S at the para positions, are theoretically shown to exhibit exopolyhedral multiple bonding on oxidation. Successive removal of two and four electrons from the parent B(n)H(n)(-)(2)X(2) results in highly varied and intriguing skeletal deformations that are ...