A distinct tetradentate N2O2-type ligand: (o-Carboranyl)bis(2-hydroxymethyl)pyridine
A new chiral racemic ligand (o-carboranyl)bis(2-hydroxymethyl)pyridine oCB(hmpH)2, that is composed of a central o-carborane unit where two arms radiate out of the cluster carbons each one containing a 2-pyridylmethylalcohol chelating arms, provides two potentially bidentate {NO} or one tetradentate...
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| Autores principales: | , , , |
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| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00442313_v639_n7_p1194_DiSalvo |
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| Sumario: | A new chiral racemic ligand (o-carboranyl)bis(2-hydroxymethyl)pyridine oCB(hmpH)2, that is composed of a central o-carborane unit where two arms radiate out of the cluster carbons each one containing a 2-pyridylmethylalcohol chelating arms, provides two potentially bidentate {NO} or one tetradentate {N2O2} binding pockets. An unprecedented octahedral CoII complex [CoCl2(anti- oCB(hmpH)2] was obtained under aerobic conditions and characterized by X-ray crystallography as well as IR and NMR spectroscopy. anti-oCB(hmpH) 2 acts as a tetradentate N2O2-ligand affording the complex as a racemic mixture of cis-α Δ-[CoCl2( RRanti-oCB(hmpH)2)] and Λ-[CoCl2( SSanti-oCB(hmpH)2)]. The new ligand oCB(hmpH)2 appears to be suitable for producing a variety of new chiral-at-metal complexes. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
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