Both square planar and tetrahedral isomers of the four-coordinate complex [Co(Bc(tBu))2] with a bis(3-tert-butylimidazol-2-ylidene)borate ligand (Bc(tBu)) have been isolated while only a tetrahedral configuration was found for the Fe(ii) analogue [Fe(Bc(tBu))2]. Novel co-crystals containing both isomers of [Co(Bc(tBu))2] have been obtained from recrystallization.

New density functional theory and ab initio computations on the [Fe(CO)5] system are reported. Careful exploration of basis set and correlation effects leads to "best" values for the difference in energy deltaE(1,3) between ground state 3[Fe(CO)4] and the singlet excited state of ca. 8 kcal mol(-1), and for the bond dissociation energy BDE(3) of [Fe(CO)5] with respect to ground state fragments ...

Materials and Methods: The silver (Ag), cobalt (Co), chromium (Cr), iron (Fe), mercury (Hg), rubidium (Rb), antimony (Sb), selenium (Se), and zinc (Zn) content and Co/Ag, Cr/Ag, Fe/Ag, Hg/Ag, Sb/Ag, Se/Ag, Co/Rb, Cr/Rb, Fe/Rb, Hg/Rb, Sb/ Rb, Se/Rb, Co/Zn, Cr/Zn, Fe/Zn, Hg/Zn, Sb/Zn, and Se/Zn ratios were estimated in normal bone samples from 27 patients with intact bone (12 females and 15 males...

Oceanic iron (Fe) fertilization experiments have advanced the understanding of how Fe regulates biological productivity and air-sea carbon dioxide (CO(2)) exchange. However, little is known about the production and consumption of halocarbons and other gases as a result of Fe addition. Besides metabolizing inorganic carbon, marine microorganisms produce and consume many other trace gases. Severa...

Background: Unsafe food consumption is a severe problem because of heavy metal contamination, which is caused by director indirect activities of industries. The present study was conducted to assess the risk of human health by Heavy metals (Cu, Co, Fe, Zn and Mn) through the intake of vegetables and fishes obtained from the area adjacent to the Hazaribag tannery campus, Dhaka, Bangladesh. Resul...

First row transition metal complexes of phthalocyanine are employed as catalysts for the oxidation of cyclohexene and cyclooctene using iodosylbenzene and pentafluoroiodosyl benzene. The catalysis was performed in dichloromethane: methanol:water (80:18:2) solvent mixture.  The products of the catalysis for cyclohexene are epoxycyclohexane, 2-cyclohexene-1-ol and 2-cyclohexene-1-one whereas ...

Introduction: Isheyevo is a metal-rich carbonaceous chon-drite with metal-rich and metal-poor lithologies that are most similar to the CBb and CH chondrites, respectively [1]. All consist of similar components – Fe,Ni metal, chondrules, refractory inclusions, amoeboid olivine aggregates and heavily hydrated lithic clasts. We continued our investigation of these components of Isheyevo and found ...

The title compound, [Co(C(10)H(8)N(2))(3)][Fe(C(2)O(4))(3)]·H(2)O, con-sists of two discrete tris-(chelate) metal ions (Co(III)N(6) and Fe(III)O(6) chromophores) and a water mol-ecule. The structure is highly symmetrical; the Co(III) and Fe(III) ions occupy positions with site symmetry 3.2. The coordination polyhedra of the metal atoms have a nearly octa-hedral geometry with noticeable trigonal...

Introduction: The 3.8 km in diameter Steinheim Basin (Baden-Württemberg, SW Germany) is a small, complex impact structure hosted by a sequence of Triassic to Upper Jurassic sandstones, marls, and limestones that build up the Swabian Alb plateau [1]. The specific alignment of the Steinheim Basin, the 24 km in diameter and 14.4 Ma Ries crater, and the Central European tektite strewn field led [2]...