Mol-ecular structure of tris-[(6-bromo-pyridin-2-yl)meth-yl]amine.

Coordination compounds of polydentate nitro-gen ligands with metals are used extensively in research areas such as catalysis, and as models of complex active sites of enzymes in bioinorganic chemistry. Tris(2-pyridyl-meth-yl)amine (TPA) is a tripodal tetra-dentate ligand that is known to form coordination compounds with metals, including copper, iron and zinc. The related compound, tris-[(6-bromo-pyridin-2-yl)meth-yl]amine (TPABr), CHBrN, which possesses a bromine atom on the 6-position of each of the three pyridyl moieties, is also known but has not been heavily investigated.

Crystal structure of hexa-kis-(dimethyl sulfoxide-κ)cobalt(II) bis-[tri-chlorido-(quinoline-κ)cobaltate(II)].

There are few reports that describe crystal structures of compounds containing cobalt complexed to either dimethyl sulfoxide (MeSO) or quinoline (CHN). The title compound, [Co(CHOS)][CoCl(CHN)], is a cobalt salt in which the metal ion is complexed to both MeSO and quinoline. In particular, we observed that anhydrous cobalt(II) chloride reacts with quinoline in MeSO to form a salt that is to be formulated as [Co(MeSO)]{[CoClquinoline]}.