70377-87-6

Basic information

• Product Name: bis(eta8-Cyclobutenooctatetraene) uranium
• Synonyms: bis(eta8-Cyclobutenooctatetraene) uranium
• CAS NO: 70377-87-6
• Molecular Formula: C20H20U-16
• Molecular Weight: 498.4105
• Mol File: 70377-87-6.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 190.9°Cat760mmHg
• Flash Point: 53.6°C
• Appearance: /
• Density: g/cm³
• CAS DataBase Reference: bis(eta8-Cyclobutenooctatetraene) uranium(CAS DataBase Reference)
• NIST Chemistry Reference: bis(eta8-Cyclobutenooctatetraene) uranium(70377-87-6)
• EPA Substance Registry System: bis(eta8-Cyclobutenooctatetraene) uranium(70377-87-6)

Safety Data

• Hazardous Substances Data: 70377-87-6(Hazardous Substances Data)

Upstream product

• 78198-93-3 dipotassium bicyclo[6.2.0]deca-1,3,5,7-tetraene 
• 10026-10-5 uranium(IV) chloride 

Relevant articles and documents

Bis[π-(cyclobutenocyclooctatetraene)]uranium(IV)

The title compound 3 was prepared by reaction of cyclobutenocyclooctatetraene dianion 1 with UCl4 and characterized by visible, IR, NMR, and mass spectra. The magnetic susceptibility shows Curie-Weiss dependence to 15 K and is temperature independent between 15 and 4.2 K. Variable-temperature 1H NMR from -80 to +70°C as well as chemical trapping experiments show no evidence for opening of the cyclobutene ring to a quinodimethane moiety. The 1H NMR spectrum is analyzed in terms of pseudocontact and contact contributions. It is shown that μ⊥2 ≠ 0 and that μ∥2 - μ⊥2 = 12.5 μB2.