1,3-二(二氰基亚甲基)方酸盐

1,3-二(二氰基亚甲基)方酸盐是一类含有C
10N
4O2−
2或((N≡C−)₂C=)₂(C₄O₂)²⁻二价阴离子的化合物。它是方酸根的两个对位氧被二氰基亚甲基（=C(−C≡N)₂）取代得到的化合物。

1,3-二(二氰基亚甲基)方酸盐
识别
CAS号	179169-49-4  Y
SMILES	[O-]C1C(C1=C(C#N)C#N)C([O-])=C(C#N)C#N
性质
化学式	C 10N 4O2− 2
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

其阴离子可由方酸-1,2-二丁酯（由方酸和正丁醇反应制得）和金属钠与丙二腈反应得到。钠盐和其它盐类在乙醇中反应，可以制得多种盐类。^[1]

盐类

化学式	CAS号	性质
2K+·Na+·Cl−·K 2C 10N 4O2− 2·1⁄2CH3CN	1194978-84-1	橙色[1]
7Rb+·Na+·2Cl−·3Rb 2C 10N 4O2− 2·CH 3CH 2OH	1194978-87-4	橙色，96 °C失去一分子乙醇，稳定至361 °C
Mg2+·2Na+C 10N 4O2− 2·NO− 3·6H2O·CH 3CH 2OH	1194978-93-2	橙色，78 °C失去一分子乙醇和六分子水，稳定至482 °C
Ca2+·C 10N 4O2− 2·6H2O	1194978-97-6	紫色，63–102脱水，稳定至468 °C
Ba2+·C 10N 4O2− 2·4H2O	1194979-01-5	橙色，71–96 °C，稳定至457 °C
2(C 4H 9)4N+·2Na+·2Cl−·2C 10N 4O2− 2·CH 3CH 2OH	1194979-08-2	橙色，111 毒C失去一分子乙醇和两分子四丁铵，稳定至238 °C
[(Ph4P)2(cdcb)]·2H2O	265111-90-8	橙色固体[2]

参考文献

1. Vanessa E. de Oliveira, Gustavo S. de Carvalho, Maria I. Yoshida, Claudio L. Donnici, Nivaldo L. Speziali, Renata Diniz and Luiz Fernando C. de Oliveira (2009), "Bis(dicyanomethylene)squarate squaraines in their 1,2- and 1,3-forms: Synthesis, crystal structure and spectroscopic study of compounds containing alkali metals and tetrabutylammonium ions." Journal of Molecular Structure Volume 936, Issues 1–3, Pages 239–249 doi:10.1016/j.molstruc.2009.08.002
2. Paul-Louis Fabre, Christophe Pena, Anne Marie Galibert, Brigitte Soula, Gérald Bernardinelli, Bruno Donnadieu, Paule Castan. Pseudo-oxocarbons complexes - complexation of 2,4-bis(dicyanomethylene)-cyclobutane-1,3-dione dianion with copper. X-ray identification and electrochemical properties of the dianion and copper(I) and (II) complexes. Canadian Journal of Chemistry. 2000-02-06, 78 (2): 280–290 [2020-10-10]. ISSN 0008-4042. doi:10.1139/v99-245 （英语）.