The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 530-62-1, Name is Di(1H-imidazol-1-yl)methanone, SMILES is O=C(N1C=CN=C1)N2C=CN=C2, in an article , author is Ren, Liyuan, once mentioned of 530-62-1, Application In Synthesis of Di(1H-imidazol-1-yl)methanone.
Synthesis and study the liquid crystalline properties of compounds containing benzoxazole core and terminal vinyl group
Terminal vinyl-based benzoxazole liquid crystalline compounds, 2-(3-fluoro-4MODIFIER LETTER PRIME-alkoxy-1,1MODIFIER LETTER PRIME-biphenyl -4-yl)-5-(2-propenyloxymethyl)-benzoxazole (nPPF(2)BP), were synthesised and their structures were confirmed by infrared (IR) spectra, proton nuclear magnetic resonance (H-1-NMR) spectra, gas chromatography with electron impact-mass spectrometry (GC/EI-MS), matrix-assisted laser desorption/ionisation-time of flight (MALDI-TOF) mass spectrometry and elemental analysis (EA). The compounds show enantiotropic smectic/nematic phases with mesophase ranges are 71-97 degrees C and 87-136 degrees C on heating and cooling processes for nPPF(2)BP, respectively. They give low melting points due to lateral fluoro substituent and flexible terminal 2-propenyloxymethyl chain. It is found that the compounds nPPF(2)BP with shorter alkoxy chain (n = 3, 4) exhibit a wide range of nematic mesophase, which is ascribed to enhanced pi-pi interaction caused by terminal vinyl moiety, whereas further elongation of the terminal alkoxy chain results in supressing nematic phase and increasing smectic mesophase. Compared with methyl terminated analogues, 2-propenyloxymethyl terminated compounds nPPF(2)BP display much lower melting points and wider or comparable mesophase range both in heating and cooling. [GRAPHICS] .
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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem