An exceedingly stable diiron(II,III) complex ion (tz)Fe(CN)525- with comproportionation constants between 108 (in H2O) and 1019 (in CH3CN)

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Angewandte Chemie, International Edition 38 (20): 3072--3074 (1999)
DOI: 10.1002/(SICI)1521-3773(19991018)38:20{\textless}3072::AID-ANIE3072{\textgreater}3.0.CO;2-2


(NEt4)6(NC)5FeLFe(CN)5 (1; L = 1,2,4,5-tetrazine) and (NEt4)5(NC)5FeLFe(CN)5 (2) were prepd. The mixed valent 2 was exceedingly stable as indicated by the solvent dependent comproportionation consts. of 1. ESR, IR and UV-visible spectra are reported for 2. The use of the tetrazine bridge increases the stability remarkably compared to the pyrazine bridged analog. on SciFinder(R)



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