Structure of the stable isomer of the bis(ethane-1,2-diamine)(N-methylethane-1,2-diamine)cobalt(III) cation, [Co(meen)(en)₂]³⁺

Searle, Graeme H., Tiekink, Edward R.T., Atkinson, Ian M., and Keene, F. Richard (1993) Structure of the stable isomer of the bis(ethane-1,2-diamine)(N-methylethane-1,2-diamine)cobalt(III) cation, [Co(meen)(en)₂]³⁺. Acta Crystallographica. Section C: Crystal structure communications, 49 (1). pp. 13-16.

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Abstract

Bis(ethane-1,2-diamine-N,N')(N-methyl-ethane-1,2-diamine-N,N')cobalt(III) triperchlorate monohydrate, [Co(C₃H10N₂)(C₂H₈N₂)₂](ClO₄)₃.H₂O, M(r) = 569.6, monoclinic, P2₁/n, a = 10.280 (1), b = 13.905 (2), c = 14.533 (2) Å, β = 90.30 (1)-degrees, V = 2077 (2) ų, Z = 4, D(x) = 1.821 g cm⁻³, λ(Mo Kα) = 0.7107 Å, μ = 12.84 cm⁻¹, F(000) = 1176, T = 293 (1) K, R = 0.051 for 2138 observed reflections. The Co atom in the cation is octahedrally coordinated by six N atoms from three chelating diamine ligands; Co-N 1.967 (5)-1.999 (5) Å, with Co-N(CH₃) the longest. The structure is a racemate and the conformational structure is Λ-R-δ*λλ (for one enantiomer). Comparisons are made with the structure calculated by molecular mechanics using an MM2 force field. The crystal lattice is held together via hydrogen bonds involving the cation, perchlorate anions and the water molecule of crystallization.

Item ID: 22823
Item Type: Article (Refereed Research - C1)
Keywords: cobalt(III) complexes; n-methylethane-1,2-diamine; [co(meen)₂(en)]³⁺; [co(meen)₃]³⁺
ISSN: 1600-5759
Date Deposited: 16 Aug 2012 00:09
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030207 Transition Metal Chemistry @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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