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Biphenyl is a solid at room temperature, with a melting point of 69.2 °C (156.6 °F). In the gas phase the molecule exists in two enantiomorphic twisted forms with an angle between the planes of the two rings of 44.4°. In the room-temperature solid, biphenyl is crystalline with space group P2 1 /c, which does not allow for chiral crystals.
4,4′-Bipyridine (abbreviated to 4,4′-bipy or 4,4′-bpy) is an organic compound with the formula (C 5 H 4 N) 2. It is one of several isomers of bipyridine. It is a colorless solid that is soluble in organic solvents. is mainly used as a precursor to N,N′-dimethyl-4,4′-bipyridinium [(C 5 H 4 NCH 3) 2] 2+, known as paraquat.
The industrial synthesis of 4,4′-biphenol was developed by Allan Hay in the 1960s. [2] [3] As the direct oxidative coupling of phenol gives a mixture of isomers, [4] [5] 4,4′-biphenol is instead prepared from 2,6-di-tert-butylphenol, where para-coupling is the only possibility. [3]
Three isomers are common, varying by the positions of the isocyanate groups around the rings: 2,2′-MDI, 2,4′-MDI, and 4,4′-MDI. The 4,4′ isomer is most widely used, and is also known as 4,4′-diphenylmethane diisocyanate. [3] This isomer is also known as Pure MDI. MDI reacts with polyols in the manufacture of polyurethane. It is the ...
Molar mass: 170.211 g·mol −1 ... 4-Phenylphenol, also known as biphenyl-4-ol and 4-hydroxybiphenyl is an organic compound. It is a phenol analog of biphenyl.
It is used in the synthesis of modafinil [4] and the benzhydryl group is present in the structure of many histamine H1 antagonists like diphenylhydramine. Benzhydrol is also used in the production of agrochemicals as well as other organic compounds and as a terminating group in polymerizations .
4-Methyl-2,4-bis(4-hydroxyphenyl)pent-1-ene (MBP) is a metabolite of bisphenol A (BPA). [1] MBP has potent estrogenic activity in vitro and in vivo , up to thousandfold stronger than BPA. [ 2 ] It may also play a role in neuronal cell apoptosis [ 3 ] and may increase risk for several forms of cancer.
Different ways of representing a methyl group (highlighted in blue) In organic chemistry, a methyl group is an alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms, having chemical formula CH 3 (whereas normal methane has the formula CH 4). In formulas, the group is often abbreviated as Me.