Bis(η-1,5-cyclooctadiene)cobaltlithium

✍ Scribed by Dr. Klaus Jonas; Dr. Richard Mynott; Dr. Carl Krüger; Dr. Janine C. Sekutowski; Dr. Yi-Hung Tsay

• Publisher: John Wiley and Sons
• Year: 1976
• Tongue: English
• Weight: 222 KB
• Volume: 15
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.197607671

✦ Synopsis

shows that the strength of the arsenic-chlorine bond increases [2.04+2.59 mdyne/A] in the transition AsCl3+AsOCI3, exactly as in the system PCI3+POCl3 [2.34-+2.98 mdyne/A]. The compounds are therefore also related in the details of their bonding.

AsOCI3 slowly decomposes at -25"C, and much more rapidly at ca. O' C, with formation of As2O3Cl4.

This compound is stable up to 150°C. Its vibrational spectrum reveals disappearance of the As=O double bond, thus ruling out the structure P2O3CI,[Cl2P(O)-O-(0)PCl2]. It is also not volatile, but decomposes above 200°C with loss of AsCI3+Cl2 to give "AszOS"-a process which can be readily monitored in the mass spectrum.

As203CI4 is obviously a polymer. I t can be isolated in analytically pure form, but is X-ray amorphous. No crystallization takes place even after 50 hours' annealing at 120°C. In this compounds arsenic is doubtless pentacoordinated, or hexacoordinated by way of chlorine bridges.