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Organic Chemistry Nomenclature
Published in Arthur W. Hounslow, Water Quality Data, 2018
Biphenyls consist of two benzene rings joined by a single bond. Substituents on each ring are designated by separate number and prime number, for example, 1 or 1′ designate the same relative position on each of the two rings. Terphenyls consist of three benzene rings each joined by single bonds. In this case they may be ortho-, meta-, or para- configurations as shown below. Much of the following is from Waid (1986).
Theory of Radiation-Induced Cracking Reactions in Hydrocarbons
Published in Yuriy Zaikin, Raissa Zaikina, Petroleum Radiation Processing, 2013
Tomlinson et al. (Tomlinson 1966, Tomlinson et al. 1966a) studied radiation and RT decomposition of the terphenyls and the partly hydrogenated terphenyl mixture. A focal point of these studies was the evaluation of a terphenyl mixture as a lowmelting coolant for a nuclear reactor.
Synthesis and mesomorphism of tetrafluoro substituted 4-cyano oligophenyls
Published in Liquid Crystals, 2019
Jakub Herman, Ewelina Dmochowska, Marta Pytlarczyk, Piotr Harmata
Terphenyl unit is one of the most common choices, where high chemical, thermal and photostability is required in liquid crystal material. However, it is also often selected for medium to high birefringence systems, because of its increased electron conjugation. For this reason, we decided to increase even more the conjugation, keeping terphenyl core unchanged, and modifying only the terminal environment. An oxygen atom and sulphur atom being more polarisable than carbon atom, help to elongate the electron conjugation beyond the aromatic core, when they are inserted directly between alkyl chain and molecular core [29] – compounds 5OT and 5ST. Both heteroatoms deteriorated properties of terphenylates significantly. Compounds do not show liquid crystal behaviour, they have higher melting temperatures and enthalpies compared to their pentyl 5T analogue.