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Heteronucleare Mehrkernkomplexe. Darstellung und Struktur von [Mn III {(OH) 2 Co III (en) 2 } 3 ](ClO 4 ) 4 Cl 2 ·4H 2 O
Author(s) -
Thewalt Ulf,
Müller Susanne
Publication year - 1988
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19881211207
Subject(s) - chemistry , unpaired electron , crystallography , octahedron , crystal structure , denticity , manganese , inorganic compound , aqueous solution , magnetic moment , x ray crystallography , metal , inorganic chemistry , molecule , physics , organic chemistry , diffraction , optics , condensed matter physics
Polynuclear Mixed‐Metal Complexes. Preparation and Structure of [Mn 111 {(OH) 2 Co 111 (en) 2 }](ClO 4 ) 4 Cl 2 ·4H 2 O Aerial oxidation of Mn II in an aqueous solution containing [(en) 2 Co III (OH)(H 2 O)] 2+ cations at pH ca. 7 gives the title complex 1 , which has been characterized by a single crystal X‐ray structure determination. Three bidentate [(en) 2 Co(OH) 2 ] + groups are coordinated at the Mn III central ion giving rise to a Jahn‐Teller distorted octahedron with two long Mn–O bonds [2.139(5) and 2.155(5) Å] and four short Mn–O bonds [1.930(4) to 1.965(5) Å]. The magnetic moment of 4.79 BM is close to the expected value for four unpaired electrons at the Mn III central ion. The cation antipodes exhibit the configurations Δ(ΛΛΛ) and Λ(ΔΔΔ).