Crystallographic data and infrared spectra of the hydrates of calcium and strontium nitroprussides

Alvarez, A. G.; Aymonino, P. J.; Baran, Enrique J.; Gentil, Luis A.; Varetti, E.L.

doi:10.1016/0022-1902(76)80397-1

Cited by 13 publications

(10 citation statements)

References 7 publications

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“…A previous determination of cell dimensions and space group has been reported (Alvarez et al, 1976). We confirmed the first but have found the space group to be C2/m rather than C2.…”

Section: Methodssupporting

confidence: 79%

See 1 more Smart Citation

The crystal and molecular structure of strontium nitroprusside tetrahydrate

Castellano¹,

Piro²,

Rivero³

1977

Acta Crystallogr Sect B

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Sr[Fe(CN)sNOI.4H20 crystallizes in the monoclinic system, space group C2/m, with a = 20.08 (2), b = 7.51 (4), c = 8-42 (2) ,~,, fl = 98-4 (3) °, Z = 4. The structure was solved by the heavy-atom method and refined by least squares to R = 0.099 for 1014 reflexions. The nitroprusside ion is in a special position with site symmetry m; the water molecules can be grouped into three categories according to their chemical environments: in one category the molecule is at the van der Waals distance from its inversion-symmetryrelated molecule and also strongly hydrogen-bonded to a molecule of the second category. The third type belongs to the octahedral environment of the Sr ion. The nitrosyi groups of neighbouring nitroprusside ions are approximately parallel to a and are piled up along e at intervals of about 4 A, a distance short enough to allow a strong dipole--dipole interaction which is perhaps responsible for the broadness of the NO stretching band. The [Fe(CN)sNO] 2-ions are highly distorted octahedra with a mean Fe-C distance of 1.94 and Fe-N of 1-64/~,.

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“…A previous determination of cell dimensions and space group has been reported (Alvarez et al, 1976). We confirmed the first but have found the space group to be C2/m rather than C2.…”

Section: Methodssupporting

confidence: 79%

“…The determination of the structure of strontium nitroprusside tetrahydrate was undertaken as part of a series of chemical, spectroscopic, TGA-DTA and structural studies of the alkaline-earth nitroprussides (Lanfranconi, Alvarez & Castellano, 1973;Alvarez, Aymonino, Baran, Gentil, Lanfranconi & Varetti, 1976).…”

Section: Introductionmentioning

confidence: 99%

The crystal and molecular structure of strontium nitroprusside tetrahydrate

Castellano¹,

Piro²,

Rivero³

1977

Acta Crystallogr Sect B

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“…(1) 5185 (5) 3414 (4) 2017 (4) C (2) 5706 (4) 407 (4) 1928 (3) C (3) 2090 (4) 578 (4) 1902 (3) C (4) 1651 (4) 3718 (4) 1944 (3) C (5) 2740 (4) 1682 (3) 3800 (4) N (1) 6071 (5) 4166 (4) (5) 2185 (4) 1494 (4) (7) 7386 (4) 1042 (3) 4757 (4) n (8) 7179 (4) 2521 ( (Lanfranconi, Alvarez & Castellano, 1973) and Sr[Fe(CN)5(NO)].4H20 (CasteUano, Piro & Rivero, 1977a). The strong dipole-dipole interaction between the nitrosyl groups arising from the arrangement described above is probably responsible for the broadness of the NO band at about 1960 cm -~ (Alvarez et al, 1976). A wide NO band also occurs for the other above-mentioned nitroprusside salts (Khanna, Brown & Jones, 1969;Varetti & Aymonino, 1973;Aymonino, Lesk, Varetti, Castellano, Piro, Podjarny & Rivero, 1980).…”

mentioning

confidence: 84%

“…Aymonino, Baran, Gentil, Lanfranconi & Varetti, 1976;Castellano, Piro & Rivero, 1977a,b;Rivero et al, 1978;Castellano, Piro, Podjarny, Rivero, Aymonino, Lesk & Varetti, 1978;Punte, Rigotti, Rivero, Podjarny & Castellano, 1980). Crystals were obtained by slow evaporation from an aqueous solution.…”

Section: Structure Of Thallium Nitroprussidementioning

confidence: 99%

Structure of calcium nitroprusside tetrahydrate

Punte¹,

Rigotti²,

Rivero³

et al. 1980

Acta Crystallogr Sect B

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“…Aymonino, Baran, Gentil, Lanfranconi & Varetti, 1976;Castellano, Piro & Rivero, 1977a,b;Castellano, Piro, Podjarny, Rivero, Aymonino, Lesk & Varetti, 1978;Punte, Rigotti, Rivero, Podjarny & Castellano, 1980). Crystals were obtained by slow evaporation from an aqueous solution.…”

mentioning

confidence: 99%