Synthesis and properties of chiral rhenium pentatetraenylidene complexes of the formula [(η5-C5Me5)Re(NO)(PPh3)(CCCCCAr2)]+BF4− (CAr2=9-fluorenylidene)

Autor:	Pierre Haquette, Slawomir Szafert, John A. Gladysz, Stephen B. Falloon
Rok vydání:	2000
Předmět:	Inorganic Chemistry 9-fluorenylidene Chemistry Yield (chemistry) Organic Chemistry Materials Chemistry Organic chemistry chemistry.chemical_element Physical and Theoretical Chemistry Rhenium Biochemistry Medicinal chemistry Ion
Zdroj:	Journal of Organometallic Chemistry. 604:52-58
ISSN:	0022-328X
DOI:	10.1016/s0022-328x(00)00201-1
Popis:	The sequential reaction of (η 5 -C 5 Me 5 )Re(NO)(PPh 3 )(CCCCH) with n -BuLi (one equivalent), 9-fluorenone (OCAr 2 ; 1.5 equivalents), and Me 3 O + BF 4 − (3.0 equivalents) gives thermally labile (η 5 -C 5 Me 5 )Re(NO)(PPh 3 )(CCCCC(OMe)Ar 2 ) ( 2a ) as an orange–red powder in 69% yield. Analogous reactions with 2,7-dichloro- and 2,7-dibromofluorenone give the corresponding complexes 2b , c (68–71%). Treatment of 2a–c with BF 3 ·OEt 2 (one equivalent) gave the title complexes ( 3a – c ) as labile dark blue powders (79–83%) that exhibited diagnostic cumulenic IR bands ν CCC (1993–1987, 1902–1894 cm −1 ) and ReC 13 C-NMR signals (256.9 ppm, J CP =10.8 Hz), and richly featured UV–vis spectra. Attempts to prepare stabile derivatives of 3a – c (additions of phosphines, amines, TCNE; anion metatheses) invariably gave a multitude of products.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ebc7406e9bd3be07dacf86ba540bc28c https://doi.org/10.1016/s0022-328x(00)00201-1 Zobrazit plný text záznamu Full Text from ScienceDirect