108816-39-3

Basic information

• Product Name: Bis(tetraphenylphosphonium)-<4-(dicyanmethylen)-3,5-dioxo-1-cyclopenten-1,2-diyl>bis(dicyanmethanid)
• CAS NO: 108816-39-3
• Molecular Weight: 962.986
• Mol File: 108816-39-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Bis(tetraphenylphosphonium)-<4-(dicyanmethylen)-3,5-dioxo-1-cyclopenten-1,2-diyl>bis(dicyanmethanid)(CAS DataBase Reference)
• NIST Chemistry Reference: Bis(tetraphenylphosphonium)-<4-(dicyanmethylen)-3,5-dioxo-1-cyclopenten-1,2-diyl>bis(dicyanmethanid)(108816-39-3)
• EPA Substance Registry System: Bis(tetraphenylphosphonium)-<4-(dicyanmethylen)-3,5-dioxo-1-cyclopenten-1,2-diyl>bis(dicyanmethanid)(108816-39-3)

Safety Data

• Hazardous Substances Data: 108816-39-3(Hazardous Substances Data)

Upstream product

• 2751-90-8 tetraphenylphosphonium bromide 
• 72893-87-9 Dikalium-<4-(dicyanmethylen)-3,5-dioxo-1-cyclopenten-1,2-diyl>bis(dicyanmethanid) 
• 99051-86-2 <3,4-Bis(dimethylamino)-2,5-dioxo-3-cyclopenten-1-yliden>malononitril 
• 36393-88-1 Krokonsaeurediamid 

Relevant articles and documents

A New Synthesis and the Crystal Structure Analysis of "Croconate Blue", 1,2,4-Tris(dicyanomethylene)croconate

Reaction of the croconic acid diamide 9 with malononitrile in methanol leads to the condensation product 10, in which the two dimethylamino groups can be replaced by the anion of malononitrile to yield the potassium salt of the pseudooxocarbon dianion, so-called "Croconate Blue" 11a.Contrary to earlier findings, the structure of 11b, proved by X-ray diffraction, shows that the dicyanomethylene substituents of the dianion are located in 1,2,4-position of the five-membered ring.