Powder X-ray diffraction study of disilver(1+) pentacyanonitrosylferrate(2−)

Venegas, V.; Gómez, Ariel; Reguera, E.

doi:10.1017/s0885715600010563

Cited by 4 publications

(2 citation statements)

References 12 publications

(14 reference statements)

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“…The [Fe(CN) 5 (NO)] 2- nitroprusside anion is perhaps the earliest discovered nitrosyl complex, and it remains the subject of intense research efforts. − Numerous single-crystal ,− and powder − X-ray/neutron diffraction studies continue to be carried out on nitroprusside with various counterions. The bonding in these cation−anion pairs is not always straightforward since there is the possibility of bridging interactions via the cyanide ligands .…”

Section: Group 8 Nitrosylsmentioning

confidence: 99%

Coordination and Organometallic Chemistry of Metal−NO Complexes

2002

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Section: Group 8 Nitrosylsmentioning

confidence: 99%

Coordination and Organometallic Chemistry of Metal−NO Complexes

2002

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“…Silver nitroprusside crystallizes in monoclinic unit cell in the Pc space group , with two formula units per unit cell. According to the group theoretical calculations, for the [Fe(CN) 5 NO] 2– anion with C 4 v symmetry, there are 33 fundamental internal vibrations, − and the irreducible representation can be written as Γ = 8A 1 (IR,R) + 1A 2 (inactive) + 4B 1 (R) + 2B 2 (R) + 9E (IR,R).…”

Section: Resultsmentioning

confidence: 99%

Back-Bonding Signature with High Pressure: Raman Studies on Silver Nitroprusside

Ghalsasi¹,

Ghalsasi

Muthu

2017

Inorg. Chem.

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In centrosymmetric molecules, like A[M(CN)] (where A is alkali metal cation), normally all stretching vibrations of cyanide (CN) shift to high frequency in response to nonhydrostatic pressure, whereas, in non-centrosymmetric molecules in which one axial CN ligand is replaced by NO ligand, one observes unusual softening of only equatorial CN stretching modes. This effect is pronounced when A is replaced by Ag with difference in coordination ability of latter, resulting in expression of characteristic signature of back-bonding. One can correlate this uneven stretching of cyanide to Poisson-like effect, where the axial Fe-N, Fe-C, and C-N stretching modes harden but the equatorial C-N stretching modes soften due to expansion at the equatorial plane. Thus, the present study is focused on results of non-hydrostatic high-pressure Raman measurements on silver nitroprusside up to 11.5 GPa, for not only observing characteristic signature of "back-bonding" interaction, rarely featured in literature, but also for generating reversible flexible structures akin to noncovalent interaction.

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