On the electronic structure of tetracyanonitrosylferrate(I)

Effect of cyanide on the reaction of nitroprusside with hemoglobin: relevance to cyanide interference with the biological activity of nitroprusside

“…The two EPR signals of reduced SNP that we observe were first chemically and spectroscopically analyzed by Van Voorst and Hemmerich (21), who showed that these signals interconverted as a function of pH and suggested that they arise from [(CN)5FeNO]3~a nd [(CN)5FeNOH]2~. Subsequent work (22) with the crystallographically characterized (12) complexes of [(CN)4FeNO]2" and studies (23) using nonaqueous solvents, however, indicated that the two signals were due to [(CN^FeNO]3" and [(CN)4FeNO]2", the latter arising from loss of the CN" trans to NO. This assignment of the EPR-detectable species has been put on firm ground through a study (11) of the radiation-induced electron addition to SNP in glasses at 77 K and analysis of the effect of different glasses and annealing on the EPR signals of these reduced SNP species.…”

Stereochemical control of valence. 5. Comparison of the molecular and electronic structures of five- and six-coordinate o-phenylenebis(dimethylarsine) complexes of the {FeNO}7 group

“….4611 (3) .24600 (21) .28497 (29) 59.0(26) 23.6(13) 45.0 (23) .9(16) 4.0(21) 1.8(13) Cl (2) .2368 (3) .01009 (26) .0536( .1541 (11) .2767 (8) .4585 (10) 71 (10) 42( 6) 33 (7) 19 (6) -21(7) -6(5) 0 (1) .1900 (12) .2795 (10) .5116 (11) 120( 14) 81( 8) 77( 11) 6(8) -66 (10) -8(8)…”

When being straight bends rules: A rationale for the linear FeNO unit in the low-spin square-pyramidal {FeNO}7 tetracyanonitrosylferrate(2−) anion

“…Our hope is that a better appreciation of the electronic structures of the latter complexes will lead to a more rational approach toward developing new NO donor drugs. As an early step in that direction, we present here a DFT study of the [Fe(CN) 4 (NO)] 2À anion [19,20]. The FeNO unit in this S = 1/2 {FeNO} 7 species might have been expected to be bent, according to the rules of thumb [1,17,18] applicable to metalloporphyrin-NO complexes, but it is not; the [Fe(CN) 4 (NO)] 2À ion exhibits exact C 4m symmetry.…”