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Preparation and Characterization of Co^II^, Ni^II^, and Zn^II^ Complexes of Sterically Demanding Hexaazamacrocyclic Dithiophenolates by Mathias Gressenbuch; Vasile Lozan; Gunther Steinfeld; Berthold Kersting is a Chemistry article available to read on EtoBox.

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## Abstract __N__‐Alkylated variants of a Robson‐type 24‐membered hexaazamacrocyclic dinucleating dithiophenolate ligand bearing ethyl and propyl groups have been prepared and their ligating properties towards the 3d elements Ni, Co and Zn have been examined. The new ligands support the formation of dinuclear complexes of the type [(L^R^)M^II^~2~(L')]^+^, i.e. [(L^Et^)Ni~2~(Cl)]^+^ (7), [(L^Pr^)Ni~2~(Cl)]^+^ (8), [(L^Et^)Ni~2~(OAc)]^+^ (9), [(L^Pr^)Ni~2~(OAc)]^+^ (10), [(L^Et^)Ni~2~(O~2~COMe)]^+^ (11), [(L^Et^)Ni~2~(O~2~COEt)]^+^ (12), [(L^Et^)Zn~2~(OAc)]^+^ (14), [(L^Et^)Co~2~(Cl)]^+^ (17), and [(L^Et^)Co~2~(OAc)]^+^ (18), the overall structures of which are very similar to the corresponding complexes of the parent permethylated ligand system. The use of the longer alkyl chains expands the binding pocket of the complexes to a more conical, “calixarene”‐like cavity and has allowed for the isolation of the trication [(HL^Et^)Ni~2~]^3+^ (13), which is an intermediate in the substitution reactions of 7. Complex 13 reveals a new coordination mode of the supporting ligand with adjacent four‐ and five‐coordinate nickel atoms. Its higher stability is presumably a consequence of the increa

Who reads Preparation and Characterization of Co^II^, Ni^II^, and Zn^II^ Complexes of Sterically Demanding Hexaazamacrocyclic Dithiophenolates?

Author

Mathias Gressenbuch; Vasile Lozan; Gunther Steinfeld; Berthold Kersting

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1434-1948)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)