102892-74-0

Basic information

• Product Name: 6,8-diphenyl-7-ethynyl-7H-benzocyclohepta-5,8-dien-7-ol
• CAS NO: 102892-74-0
• Molecular Weight: 334.417
• Mol File: 102892-74-0.mol

Chemical Properties

• CAS DataBase Reference: 6,8-diphenyl-7-ethynyl-7H-benzocyclohepta-5,8-dien-7-ol(CAS DataBase Reference)
• NIST Chemistry Reference: 6,8-diphenyl-7-ethynyl-7H-benzocyclohepta-5,8-dien-7-ol(102892-74-0)
• EPA Substance Registry System: 6,8-diphenyl-7-ethynyl-7H-benzocyclohepta-5,8-dien-7-ol(102892-74-0)

Safety Data

• Hazardous Substances Data: 102892-74-0(Hazardous Substances Data)

Upstream product

• 102-04-5 1,3-Diphenylpropanone 
• 643-79-8 o-phthalic dicarboxaldehyde 
• 38558-34-8 6,8-diphenyl-7H-benzocycloheptan-7-one 
• 70277-75-7 lithium acetylide 

Downstream Products

• 191605-70-6 [(C₅H₅)Ru(PPh₃)2(=C=C=(2,7-diphenyl-4,5-benzocycloheptatrienylidene))]PF₆ 
• 1379508-46-9 6',8'-diphenyl-8-methoxyspiro[3H-naphtho[2,1-b]pyran-3,7'-7'H-benzocyclohepta-5',8'-diene] 
• 1379508-47-0 6',8'-diphenyl-9-methoxyspiro[3H-naphtho[2,1-b]pyran-3,7'-7'H-benzocyclohepta-5',8'-diene] 
• 1379508-49-2 6',8'-diphenyl-5-methoxycarbonyl-6-methylspiro[2H-naphtho[1,2-b]pyran-2,7'-7'H-benzocyclohepta-5',8'-diene] 
• 1379508-48-1 5-ethoxycarbonyl-6,6',8'-triphenylspiro[2H-naphtho[1,2-b]pyran-2,7'-7'H-benzocyclohepta-5',8'-diene] 
• 1379508-45-8 6',8'-diphenylspiro[3H-naphtho[2,1-b]pyran-3,7'-7'H-benzocyclohepta-5',8'-diene] 

Relevant articles and documents

First example of cooperative O-H...C≡C-H...Ph hydrogen bonding: Crystalline 7-ethynyl-6,8-diphenyl-7H-benzocyclohepten-7-ol

In the crystalline title compound, molecular dimers are joined by a system of interconnected O-H...C≡C-H and C≡C-H...Ph hydrogen bonds for which IR spectra indicate considerable strength; this hydrogen-bond configuration has not been observed previously.

Synthesis and photochromic properties of spiro[naphthopyran-7′H- benzocyclohepta-5′,8′-dienes]

A series of spironaphthopyrans has been synthesised by the acid-catalysed condensation between either a substituted 1-naphthol or 2-naphthol and the propargylic alcohol derived from the addition of lithium trimethylsilylacetylide to a 7H-benzocycloheptan-7-one with subsequent in situ silyl group removal. The photochromism of the novel spironaphthopyrans was characterised by a bathochromically shifted λmax coupled with a relatively quick initial fade of the photogenerated species relative to the comparable diphenyl substituted model compounds. After initial fading a relatively intense residual colour persisted for the spironaphthopyrans.