Nitronickelate

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The nitronickelates are a class of chemical compounds containing a nickel atom complexed by nitro groups, -NO2. Nickel can be in a +2 or +3 oxidation state. There can be five (pentanitronickelates), or six, (hexanitronickelates) nitro groups per nickel atom. They can be considered the double nitrites of nickel nitrite.

formulanamestructureRemarksreferences
Rb3[Ni(NO2)5]trirubidium pentanitronickelate(II) [1]
Cs3[Ni(NO2)5]tricesium pentanitronickelate(II)dark red, formed from cesium nitrite and nickel nitrite in water [2]
K3[Ni(NO2)5]·KNO2potassium pentanitronickelate potassium nitritemonoclinic, a = 7.240 Å, b = 10.946 Å, c = 7.120 Å, β = 98.086º; Z = 2; 4 nitro groups bonded to Ni by N, 1 by O (–ONO)formed by heating monohydrate at 100 °C dark purple; hygroscopic [2] [3] [4]
K4[Ni(NO2)6]·H2Opotassium hexanitronickelate monohydratehexagonal, a = 7.634 Å, c = 22.45 Å, Z = 3; nitro groups bonded to Ni via N; water not coordinatedformed from KNO2 and NiCl2 mix in water; orange brown; stable in vacuum [2] [3] [4]
K2Ca[Ni(NO2)6]potassium calcium hexanitronickelatecubic, a = 10.31 Å, Z = 4buff [5]
K2Sr[Ni(NO2)6]potassium strontium hexanitronickelatecubic, a = 10.5063 Å, Z = 4, density = 2.867 g/cm3brown yellow [6]
K2Ba[Ni(NO2)6]potassium barium hexanitronickelatecubic Fm3 (and m3m), a = 10.7800 Å, Z = 4, density = 2.918 g/cm3brown yellow [7]
K2Pb[Ni(NO2)6]potassium lead hexanitronickelatecubic Fm3, a = 10.577 Å, Z = 4, density = 3.480 g/cm3: No NO2 group disorderbuff colour [8]
N(CH3)4[Ni(NO2)3]tetramethylammonium nickel nitrite TMNINhexagonal perovskite P3m1, a = 9.103 Å, c = 7.082 Å, V = 508.2 Å3, Z = 2, density = 1.770 g/cm3; all nitros are bidentate, nickel either links to N or O of the NO2, forming a chain of nickel alternating with ONOyellow brown; one-dimensional Heisenberg antiferromagnet; Haldane material; phase transitions at 409.1 and 428.4 K due to rotation of N(CH3)4 [2] [9] [10]

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<span class="mw-page-title-main">Sodium hexanitritocobaltate(III)</span> Chemical compound

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<span class="mw-page-title-main">Nickel(II) nitrate</span> Chemical compound

Nickel nitrate is the inorganic compound Ni(NO3)2 or any hydrate thereof. The anhydrous form is not commonly encountered, thus "nickel nitrate" usually refers to nickel(II) nitrate hexahydrate. The formula for this species is written in two ways: Ni(NO3)2.6H2O and, more descriptively [Ni(H2O)6](NO3)2. The latter formula indicates that the nickel(II) center is surrounded by six water molecules in this hydrated salt. In the hexahydrate, the nitrate anions are not bonded to nickel. Also known are three other hydrates: Ni(NO3)2.9H2O, Ni(NO3)2.4H2O, and Ni(NO3)2.2H2O. Anhydrous Ni(NO3)2 is also known.

Nickel(II) nitrite is an inorganic compound with the chemical formula Ni(NO2)2. Anhydrous nickel nitrite was first discovered in 1961 by Cyril Clifford Addison, who allowed gaseous nickel tetracarbonyl to react with dinitrogen tetroxide, yielding a green smoke. Nickel nitrite was the second transition element anhydrous nitrite discovered after silver nitrite.

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<span class="mw-page-title-main">Cyanonickelate</span> Class of chemical compounds

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<span class="mw-page-title-main">Transition metal nitrile complexes</span> Class of coordination compounds containing nitrile ligands (coordinating via N)

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<span class="mw-page-title-main">Transition metal chloride complex</span> Coordination complex

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<span class="mw-page-title-main">Transition metal dithiocarbamate complexes</span>

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<span class="mw-page-title-main">Transition metal nitrite complex</span> Chemical complexes containing one or more –NO₂ ligands

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<span class="mw-page-title-main">Transition metal oxalate complex</span>

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References

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  2. 1 2 3 4 Goodgame, David M. L.; Hitchman, M. A. (April 1967). "Spectroscopic studies of some compounds with octahedral polynitrite anions". Inorganic Chemistry. 6 (4): 813–816. doi:10.1021/ic50050a034.
  3. 1 2 Green, RW; Bell, B (1973). "Complex nickel nitrites. I. Complexes of N-substituted Propane-1,3-diamines". Australian Journal of Chemistry. 26 (8): 1663. doi:10.1071/CH9731663.
  4. 1 2 Grey, Ian E.; Hitchman, Michael A.; Rowbottom, Graham L.; Scarlett, Nicola V. Y.; Wilson, Jenny (1994-01-01). "Crystal and molecular structure and spectra of K4[Ni(NO2)6]·H2O and K3[Ni(NO2)4(O2N)]". Journal of the Chemical Society, Dalton Transactions (4): 595–601. doi:10.1039/DT9940000595. ISSN   1364-5447.
  5. Hathaway, B. J.; Slade, R. C. (1968). "The influence of cations on the properties of the hexanitrometallate anions in the K2MIIMII(NO2)6 type of complex of the nickel(II) and copper(II) ions". Journal of the Chemical Society A: Inorganic, Physical, Theoretical: 85. doi:10.1039/J19680000085.
  6. Takagi, S.; Joesten, M. D.; Lenhert, P. G. (15 August 1976). "Potassium strontium hexanitrocuprate(II) and potassium strontium hexanitronickelate(II)". Acta Crystallographica Section B. 32 (8): 2524–2526. doi:10.1107/S0567740876008121.
  7. Takagi, S.; Joesten, M. D.; Lenhert, P. G. (15 July 1975). "Potassium barium hexanitronickelate(II)". Acta Crystallographica Section B. 31 (7): 1970–1972. doi:10.1107/S0567740875006590.
  8. Takagi, S.; Joesten, M. D.; Lenhert, P. G. (15 July 1975). "Potassium lead hexanitronickelate(II)". Acta Crystallographica Section B. 31 (7): 1968–1970. doi:10.1107/S0567740875006589.
  9. Chou, Liang-Kuei; Abboud, Khalil A.; Talham, Daniel R.; Kim, W. W.; Meisel, Mark W. (November 1994). "Structure- and Orientation-Dependent Magnetic Susceptibility of Tetramethylammonium Nickel Nitrite, (CH3)4N[Ni(NO2)3]: An S = 1 One-Dimensional Heisenberg Antiferromagnet". Chemistry of Materials. 6 (11): 2051–2055. doi:10.1021/cm00047a026.
  10. Kong, Li-Hui; Fu, Da-Wei; Ye, Qiong; Ye, Heng-Yun; Zhang, Yi; Xiong, Ren-Gen (June 2014). "Iso-structural phase transition in tetramethylammonium nickel(II) nitrite [(CH3)4N][Ni(NO2)3]". Chinese Chemical Letters. 25 (6): 844–848. doi:10.1016/j.cclet.2014.05.028.