143033-66-3

Basic information

• Product Name: 3-Cyclobutene-1,2-dione, 3-(phenylazo)-4-(2-phenylhydrazino)-, 2-(phenylhydrazone)
• CAS NO: 143033-66-3
• Molecular Formula: C22H18N6O
• Molecular Weight: 382.425
• Mol File: 143033-66-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 3-Cyclobutene-1,2-dione, 3-(phenylazo)-4-(2-phenylhydrazino)-, 2-(phenylhydrazone)(CAS DataBase Reference)
• NIST Chemistry Reference: 3-Cyclobutene-1,2-dione, 3-(phenylazo)-4-(2-phenylhydrazino)-, 2-(phenylhydrazone)(143033-66-3)
• EPA Substance Registry System: 3-Cyclobutene-1,2-dione, 3-(phenylazo)-4-(2-phenylhydrazino)-, 2-(phenylhydrazone)(143033-66-3)

Safety Data

• Hazardous Substances Data: 143033-66-3(Hazardous Substances Data)

Upstream product

• 100-63-0 phenylhydrazine 
• 2892-51-5 squaric acid 
• 2892-62-8 3,4-dibutoxy-3-cyclobutene-1,2-dione 

Relevant articles and documents

Reactions of Squaric Acid with Phenylhydrazine: Structure and Nuclear Magnetic Resonance Spectroscopy of Cyclobutanetetraone Poly(phenylhydrazones)

The reaction of squaric acid 1 with phenylhydrazine affords three cyclobutanetetraone poly(phenylhydrazones), viz. a tetrakis(phenylhydrazone) 3, a tris(phenylhydrazone) 4a 4b and a 1,3-bis(phenylhydrazone) 5.The structure of these compounds has been determined by IR, MS and 1H and 13C NMR spectroscopy, including 2D COSY, and 1H-detected, single- and multiple-bond 2D carbon-proton chemical-shift-correlation techniques.Chemical methods were also used to elucidate the structure of bis(phenylhydrazone) 5, including its synthesis and that of its N-methyl-N-phenyl andN,N-diphenyl analogues 8 and 9 from cyclobutanetetraone, and the preparation of a quinoxaline 7 to establish the 1,3-arrangement of substituents.