55980-70-6

Basic information

• Product Name: dispiro[2.0.2.3]nona-1,5-diene
• Synonyms: Dispiro(2.0.2.3)nona-1,5-diene; Dispiro[2.0.2.3]nona-1,5-diene
• CAS NO: 55980-70-6
• Molecular Formula: C₉H₁₀
• Molecular Weight: 118.1757
• Mol File: 55980-70-6.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 206.9°C at 760 mmHg
• Flash Point: 56.1°C
• Density: 1.09g/cm³
• Vapor Pressure: 0.334mmHg at 25°C
• Refractive Index: 1.606
• CAS DataBase Reference: dispiro[2.0.2.3]nona-1,5-diene(CAS DataBase Reference)
• NIST Chemistry Reference: dispiro[2.0.2.3]nona-1,5-diene(55980-70-6)
• EPA Substance Registry System: dispiro[2.0.2.3]nona-1,5-diene(55980-70-6)

Safety Data

• Hazardous Substances Data: 55980-70-6(Hazardous Substances Data)

Upstream product

• 20968-70-1 1,2-dimethylenecyclopentane 

Relevant articles and documents

Electronic and Molecular Structure of Simple 3,3'-Bicyclopropenyls. Photoelectron Spectroscopy and Model Calculations

The electronic and molecular structure of 3,3'-bicyclopropenyl (1) and its alkyl derivatives 3,3'-dimethyl-3,3'-bicyclopropenyl (2), dispironona-1,5-diene (3), dispirodeca-1,5-diene (4), dispiroundeca-1,5-diene (5), and dispirododeca-1,5-diene (6) are studied by means of photoelectron spectroscopy and model calculations. 'Through-bond' effects in model compound 1 are analyzed in detail, illustrating a general difficulty with NDO models.Low-energy photoelectron bands of 2-6 can be assigned to ejection of electrons from cyclopropenyl ?- and Walsh-orbitals.Strong 'through-bond' coupling leads to splitting of the ?-bands in the range 1.0-1.5 eV, while the strongly conformation-dependent splitting of the Walsh-bands allows conclusions concerning the preferred torsional angles.The preference of gauche-conformation is predicted for 2 in the gas phase.