The uranocene half-sandwich: ([8]annulene)uranium(IV) dichloride and some derivatives

Autor:	Thomas R. Boussie, Alan. Zalkin, John D. Brennan, Kennith A. Smith, Andrew Streitwieser, Robert M. Moore
Rok vydání:	1990
Předmět:	Denticity Stereochemistry Organic Chemistry Trimethylphosphine Crystal structure Annulene Inorganic Chemistry chemistry.chemical_compound Crystallography Cyclooctatetraene Uranocene chemistry X-ray crystallography Physical and Theoretical Chemistry Monoclinic crystal system
Zdroj:	Organometallics. 9:2010-2016
ISSN:	1520-6041 0276-7333
Popis:	A facile synthesis of ((8)annulene)uranium(IV) dichloride (1) has been developed via the reduction of cyclooctatetraene (COT) by UCl{sub 3} or through reaction of UCl{sub 4}, COT, and NaH. The activation parameters for the coordination of trimethylphosphine (PMe{sub 3}) to 1 in THF solution have been measured. The reactivity of 1 with several mono- and bidentate alkylmetal and alkoxymetal reagents is reported. Also reported are the crystal structures of bis(pyridine)((8)annulene)uranium(IV) dichloride, (C{sub 8}H{sub 8})UCl{sub 2}(NC{sub 5}H{sub 5}){sub 2} (3), and ((8)annulene)uranium(IV) bis(acetylacetonate), (C{sub 8}H{sub 8})U(CH{sub 3}COCHCOCH{sub 3}){sub 2} (4). Crystals of 3 are monoclinic P2{sub 1}/c, with a = 15.431 (3) {angstrom}, b = 7.744 (2) {angstrom}, c = 15.665 (3) {angstrom}, Z = 4, and R{sub F} = 2.8%. Crystals are 4 are monoclinic, P2{sub 1}/n, with a = 19.166 (4) {angstrom}, b = 10.312 (2) {angstrom}, c = 9.227 (2), Z = 4, and R{sub F} = 2.7%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d8a2cb8459bc678b7c2bf6348c575278 https://doi.org/10.1021/om00157a007 Zobrazit plný text záznamu