Syntheses and physical properties of several symmetrical sexiphenyls

Autor:	Eiichi Ibuki, H. Kitamura, Yasuhiro Fujioka, Shigeru Ozasa
Rok vydání:	1980
Předmět:	Biphenyl Infrared Analytical chemistry Infrared spectroscopy General Chemistry General Medicine medicine.disease_cause Spectral line Ullmann reaction NMR spectra database chemistry.chemical_compound Crystallography chemistry Drug Discovery medicine Ultraviolet
Zdroj:	Chemical and Pharmaceutical Bulletin. 28:1468-1476
ISSN:	1347-5223 0009-2363
DOI:	10.1248/cpb.28.1468
Popis:	Seven sexiphenyls, including three new isomers, 3, 4, 3', 4'-tetraphenylbiphenyl (Id), 2, 5, 2', 5'-tetraphenylbiphenyl (IIId), and 2, 2'-di (3-biphenylyl) biphenyl (Vd), were synthesized by Ullmann homo-coupling of iodoterphenyl. The characteristic bands of the infrared spectra (675-920 cm-1) and signals of the nuclear magnetic resonance spectra of the sexiphenyls were assigned tentatively and are discussed briefly. Infrared studies indicated that the range 730-770 cm-1, generally accepted as the position of the C-H out-of-plane bending bands of phenyl rings, should be widened slightly to 730-782cm-1. The ultraviolet spectra commonly displayed a intense E-band in the narrow region of 192-207 nm. The prominent K-band above ca. 260 nm of branched sexiphenyls was taken as indicative of the presence of one or more p-linkages, as in the case of linear compounds.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::99547206e7b57b7c5af400a709a03c9a https://doi.org/10.1248/cpb.28.1468 Zobrazit plný text záznamu