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Charge‐Transfer‐Komplexe von Metalldithiolenen, XVIII. Ionenpaare von Dithiolencobaltaten mit Bipyridinium‐Akzeptoren
Author(s) -
Schmauch Georg,
Knoch Falk,
Kisch Horst
Publication year - 1995
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.19951280315
Subject(s) - chemistry , acceptor , isomerization , crystallography , electron transfer , metal , derivative (finance) , ion , charge (physics) , conductivity , electron acceptor , stereochemistry , photochemistry , catalysis , organic chemistry , quantum mechanics , financial economics , economics , condensed matter physics , physics
Charge‐Transfer Complexes of Metal Dithiolenes, XVIII. – Ion Pairs of Dithiolene Cobaltates with Bipyridinium Acceptors Ion pair charge‐transfer (IPCT) complexes of the type {A 2+ [Co(mnt) 2 ] 2− }, mnt 2− = cis‐1,2‐dicyano‐1,2‐ethenedithiolate, A 2+ = a bipyridinium derivative, posses IPCT bands in the range from 590 to 950 nm. An X‐ray structure analysis of {BQ 2+ [Co(mnt) 2 ] 2− }, BQ 2+ = 6,7,8,9‐tetrahydrodipyrido[1,2‐ a :2,1‐ c ][1,4]diazocinium, reveals that the strongly twisted acceptor and planar donor do not form mixed stacks, as usually observed in less twisted systems. Electrical conductivities of pressed powder pellets are in the range of 10 −15 to 10 −7 Ω −1 cm −1 and do not exhibit a simple correlation with the driving force of electron transfer between the ion pair components. The cis‐trans isomerization of an ethene‐bridged methyl viologen acceptor leaves the conductivity almost unchanged.