14739-46-9

Upstream product

• 624-38-4 para-diiodobenzene 
• 2113-51-1 2-iodobiphenyl 
• 24253-38-1 4-iodo-o-terphenyl 
• 95918-95-9 2,2''-bis(3-bromophenyl)-p-terphenyl 
• 82214-69-5 2-biphenylmagnesium bromide 
• 645-00-1 m-iodonitrobenzene 
• 95919-09-8 2,2''-diiodo-[1,1':4',1'']terphenyl 
• 95918-86-8 2,2''-bis(3-aminophenyl)-p-terphenyl 
• 95919-15-6 2,2''-bis(3-nitrophenyl)-p-terphenyl 
• 118163-42-1 1,4-Bis(1,2-dihydroxy-2-phenylethyl)benzene 
• 623-27-8 terephthalaldehyde, 
• 1449-46-3 benzyltriphenylphosphonium bromide 
• 1608-30-6 1,4-distyrylbenzene 

Relevant academic research and scientific papers

Alternating oligo(o,p-phenylenes) via ruthenium catalyzed diol-diene benzannulation: orthogonality to cross-coupling enables de novo nanographene and PAH construction

Ruthenium(0) catalyzed diol-diene benzannulation is applied to the conversion of oligo(p-phenylene vinylenes) 2a-c, 5 and 6 to alternating oligo(o,p-phenylenes) 10a-c, 11-13. Orthogonality with respect to conventional palladium catalyzed biaryl cross-coup

SYNTHESES AND PHYSICAL PROPERTIES OF SEVERAL POLYPHENYLENES CONTAINING MIXED LINKAGES.

Fourteen macrocyclic polyphenylenes, including ten new compounds, were synthesized by intra- or intermolecular homo-coupling of di-Grignard compound and by cross-coupling of two kinds of di-Grignard compounds with copper(II) chloride, **1H NMR spectra of the polyphenylenes, compared with those of open-chain analogues, provide valuable information on the nonplanar spacial relationship of constituting phenylene rings. UV spectra of the compounds containing p-phenylene ring(s) suggest that the lack or decrease in intensity of K-band above ca. 260 nm or a marked shift of that band provides useful conformational information. Empirical Hueckel molecular orbital calculations of longest-wavelength absorption bands of twelve polyphenylenes were also carried out.

Studies of Polyphenyls and Polyphenylenes. II. The Synthesis and Physical Properties of Polyphenyls Containing Para Linkage

Twelwe linear polyphenyls, including quinque- to octiphenyl, were synthesized by the Ullmann cross-coupling reaction of iodobiphenyl with diiodobenzene or iodoterphenyl.Ultraviolet spectral studies of the polyphenyls indicated that the positions of the K-bands above ca.260 nm, regardless of the presence of o- or m-phenylene unit(s), may be considered to be an indication of the approximate number of consecutive p-phenylene units.Infrared studies also showed that the locations of strong or medium bands in the 815-850 cm-1 region may give the same information.The HMO calculations of the longest wavelength absorption bands of twenty-four polyphenyls were carried out.A comparison between the calculated and observed wavelengths gave rather good agreement, except in the cases of two compounds.The signals of the proton magnetic resonanse spectra of eighteen polyphenyls were assigned tentatively.The correlations between the arrangement of the benzene rings and the spectral patterns are discussed.