Oxalatonickelate

The oxalatonickelates are a class of compounds that contain nickel complexed by oxalate groups. They form a series of double salts, and include clusters.

formula	name	other names	structure	Remarks	references
bis(oxalato)nickelate (2−)				[1]
Li2[(C2O4)2Ni]•6H2O	dilithium bis(oxalato)nickelate (2−)			cas=112678-94-1 dehydrate 80° decompose 345°	[2]
Na2[(C2O4)2Ni]•3H2O	disodium bis(oxalato)nickelate (2−)			cas=107996-66-5 dehydrates at 85°, decompose over 320°	[3][4]
[NH4]2[(C2O4)2Ni]•3H2O	diammonium bis(oxalato)nickelate (2−)			cas=108559-31-5 dehydrate 180-262° deaminate 262-338 °C	[3][5]
K2[(C2O4)2Ni•2H2O]•4H2O	dipotassium trans-diaquabis(oxalato-O,O')nickelate(II)-water (1/4)	potassium bis oxalate nickel(II) tetrahydrate	monoclinic a=8.647 b=6.627 c=12.118 β=101.58° V=680.3 Z=2 density=2.05 / 2.04	green cas=14244-63-4	[6][7][8][9]
Co[(C2O4)2Ni]•5H2O	cobalt(II)bis(oxalato)nickelate(II)pentahydrate			light pink	[10]
Mn[(C2O4)2Ni]•4H2O	manganese(II)bis(oxalato)nickelate(II)tetrahydrate			light blue	[11]
Cd[(C2O4)2Ni]•4H2O	cadmium(II)bis(oxalato)nickelate(II)tetrahydrate			blue	[10]
K2[Ni(C3H2O4)2(H2O)2]·2H2O	Dipotassium diaquabis(malonato-κ2O,O')nickelate(II) dihydrate		Monoclinic, C2/m a = 9.3973 Å, b = 10.8760 Å, c = 7.6283 Å, β = 115.026°, V = 706.45 Å^3, Z=2		[12]

References

1. Macintyre, Jane E. (1997). Dictionary of Inorganic Compounds, Supplement 4. CRC Press. p. 453. ISBN 9780412750205. Retrieved 21 April 2016.
2. Saha, H.L.; Mitra, S. (June 1987). "Thermal decomposition reactions of metal carboxylato complexes in the solid state. III. Thermographic and differential thermal studies of metal oxalato, malonato and succinato complexes". Thermochimica Acta 116: 53–64. doi:10.1016/0040-6031(87)88164-9.
3. Macintyre, Jane E. (1997). Dictionary of Inorganic Compounds, Supplement 4. CRC Press. p. 251. ISBN 9780412750205. Retrieved 21 April 2016.
4. Saha, H.L.; Mitra, S. (January 1987). "Thermal decomposition reactions of metal carboxylato complexes in the solid state. I.". Thermochimica Acta 109 (2): 331–342. doi:10.1016/0040-6031(87)80029-1.
5. Saha, H.L.; Mitra, S. (March 1987). "Thermal decomposition reactions of metal carboxylato complexes in the solid state". Thermochimica Acta 112 (2): 275–287. doi:10.1016/0040-6031(87)88284-9.
6. Román, P.; Guzmán-Miralles, C.; Luque, A. (15 July 1993). "Structure of dipotassium trans-diaquabis(oxalato-O,O')nickelate(II)–water (1/4)". Acta Crystallographica Section C Crystal Structure Communications 49 (7): 1336–1339. doi:10.1107/S0108270193000940.
7. Narsimhulu, M.; Raju, B.; Saritha, A.; Narayana Rao, D.; Hussain, K.A. (September 2015). "A new room-temperature ultraviolet emission material: K2[Ni(C2O4)2(H2O)2]·4H2O". Physica B: Condensed Matter 472: 45–48. doi:10.1016/j.physb.2015.05.019.
8. Macintyre, Jane E. Dictionary of Inorganic Compounds, Supplement 1. CRC Press. p. 45. ISBN 9780412490903. Retrieved 25 April 2016.
9. Macintyre, Jane E. (1997). Dictionary of Inorganic Compounds, Supplement 4. CRC Press. p. 222. ISBN 9780412750205. Retrieved 21 April 2016.
10. Deb, Nidhuban; Baruah, S. D.; Dass, N. N. (2000). "Synthesis, Characterization and Thermal Decomposition of M1[M2(C2O4)2]xH2O (x=5 for M1=Co and x=4 for M1=Cd; M2=Ni)". Journal of Thermal Analysis and Calorimetry 59 (3): 791–797. doi:10.1023/A:1010153720786.
11. Deb, Nidhuban (July 2005). "Thermal decomposition of manganese(II)bis(oxalato)nickelate(II)tetrahydrate". Journal of Thermal Analysis and Calorimetry 81 (1): 61–65. doi:10.1007/s10973-005-0746-y.
12. Xiao, Xunwen; Xu, Wei; Li, Yan; Zhang, Bin; Zhu, Daoben (12 December 2003). "Dipotassium diaquabis(malonato-κ2O,O')nickelate(II) dihydrate". Acta Crystallographica Section E Structure Reports Online 60 (1): m48–m49. doi:10.1107/S1600536803027508.