Ion Pair Charge-Transfer Complexes of Dithiolene Metalates with Diquaternary 2,2′-Biimidazoles

✍ Scribed by Lemke, Matthias ;Knoch, Falk ;Kisch, Horst ;Salbeck, Josef

• Book ID: 102791639
• Publisher: Wiley (John Wiley & Sons)
• Year: 1995
• Tongue: English
• Weight: 619 KB
• Volume: 128
• Category: Article
• ISSN: 0009-2940
• DOI: 10.1002/cber.19951280208

✦ Synopsis

Dithiolene metalates / Biimidazolium dications / Charge-transfer complexes Cycloalkylated biimidazolium dications (A") of reduction potentials from -0.4 to -1.4 V form ion pair charge-transfer complexes (A2+[M(mnt)z]2-) with dithiolene metalates, M = Zn, Ni, Pd, Pt, mnt2-= maleonitrile-2,3-dithiolate. X-ray analyses of (PzBBImZf[Ni(mnt)2]2-) [P2BBImZ+ = 1,1',3,3'bis(propane-l,3-diyl)bibenzimidazolium] and (B2BIm2+ [Pd(mnt)2]2-) [B2BImZ+ = 1,1',3,3'-bis(butane-l,4-diyl)bi- imidazolium] reveal that the solid-state structure is largely determined by the geometry of the acceptor. When the latter is strongly twisted, the usually observed mixed donor-acceptor columns are modified to a chain-like arrangement. In the case of the bibenzimidazolium dication P2BBIm2+ the other-