With two O, S or NR groups and two CC double bonds in a ring, the systems are not aromatic, and there is no reason to expect them to be planar. In fact, the simple systems are little known, and, except for 1,4-dithiin, it is necessary to look for data from fairly heavily sub...
benzene ring benzene ring n. A hexagonal ring arrangement found in benzene and other aromatic compounds, consisting of six carbon atoms with alternating single and double bonds between them, and with each carbon atom bonded to a hydrogen atom, or to other atoms or groups of atoms in derivatives...
1,4-DIACETYLBENZENE, with the chemical formula C10H10O2, has the CAS number 1009-61-6. It appears as a colorless liquid with a sweet, fruity odor. The basic structure of 1,4-DIACETYLBENZENE consists of a benzene ring with two acetyl groups attached to positions 1 and 4. This compound...
Two about equally stable conformers have been detected for the derivatives with the groups -CHPriBut, -CHBut2, and -C(OH)But2. The conformational isomerism is caused by a hindered rotation about the bond between the alkyl groups and the benzene ring; rotational barriers have been determined ...
Benzene is a widely used commodity chemical, which is currently produced from fossil resources. Lignin, a waste from lignocellulosic biomass industry, is the most abundant renewable source of benzene ring in nature. Efficient production of benzene from l
{Ti8} ring, along with three disordered terminal carboxylate –O/–OH groups (Odefectatoms) surrounding the defect site. In MIL-125-Zn, the Zn(II) site occupies the Ti(IV) vacancy, resulting in bimetallic {Ti7Zn} rings with a Zn/Ti ratio of 1.04:6.95, confirmed by inductively coupled...
(129→130). This route to these reactive 1,3-dienes often has considerable advantage over others, despite the fact that occasionally temperatures in excess of 200°C are required for ring opening, since no other reagents which might interfere with subsequent reactions of (129) are required. ...
摘要: New planar binuclear phthalocyanines sharing the benzene ring were synthesized and their spectral properties were studied. Intense absorption in the near-IR region (850 nm) was observed for the first time.关键词: phthalocyanines zinc complexes magnesium complexes electronic absorption spectra ...
Especially for ruthenapyridine 1a′ and osmapyridine 1c′, both of them are much more stable than their nonaromatic 2a′ and 2c′ by fixing the N-Cl bond with the value of 1.78 Å (the N-Cl bond length in 2a) because 2a′ and 2c′ always rearranged to 1a′ and 1c′ by ...
At room temperature, maleic anhydride is a white crystalline solid with an acrid odor, but is a liquid or gas during production. Two acid carbonyl groups and a double bond appear in its formula, which make it useful for broad industrial applications. Manufacturing processes for maleic anhydride ...