Three‐Spin System with a Twist: A Bis(semiquinonato)copper Complex with a Nonplanar Configuration at the Copper( II ) Center | Zendy

Ye Shengfa | Zendy; Sarkar Biprajit | Zendy; Lissner Falk | Zendy; Schleid Thomas | Zendy; van Slageren Joris | Zendy; Fiedler Jan | Zendy; Kaim Wolfgang | Zendy

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Three‐Spin System with a Twist: A Bis(semiquinonato)copper Complex with a Nonplanar Configuration at the Copper( II ) Center

Author(s) -

Ye Shengfa,

Sarkar Biprajit,

Lissner Falk,

Schleid Thomas,

van Slageren Joris,

Fiedler Jan,

Kaim Wolfgang

Publication year - 2005

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.200462339

Subject(s) - copper , electron paramagnetic resonance , twist , center (category theory) , chemistry , crystallography , planar , spin (aerodynamics) , photochemistry , stereochemistry , materials science , nuclear magnetic resonance , physics , geometry , organic chemistry , computer graphics (images) , computer science , mathematics , thermodynamics

A new twist : Structural twisting by about 32° between the semiquinoneiminecopper( II ) entities in 2 caused by weak Cu–S interaction results in a different spin arrangement (↑,↓,↑) than for planar 1 (↑,↑,↓). Most revealingly, 2 has an EPR spectrum typical for a radical whereas 1 displays a signal for a Cu II center. Oxidation state distributions for the 2 2+,+,0,−,2− forms are assigned on the basis of UV/Vis/NIR spectroelectrochemistry.

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