01598nas a2200181   4500008004100000245016400041210006900205260000800274300001400282490000700296520086600303100002301169700002701192700002701219700002401246700001801270856012801288       2018                        eng d00aEffect of crystal packing on the thermosalient effect of the pincer-type diester naphthalene-2,3-diyl-bis(4-fluorobenzoate): a new class II thermosalient solid0 aEffect of crystal packing on the thermosalient effect of the pin  cMAR  a4133-41390 v243 aThe pincer-like double ester naphthalene-2,3-diyl-bis(4-fluorobenzoate) (2) is pentamorphic. Upon heating crystals of form I to below their melting point (441-443 K), they undergo a phase transition accompanied by a thermosalient effect, that is, rare and visually striking motility whereby the crystals jump or disintegrate. The phase transition and the thermosalient effect are reversible. Analysis of the crystal structure revealed that form I is a class II thermosalient solid. Crystals of form III also underwent a reversible phase transition in the temperature range of 160 to 170 K; however, they were not thermosalient. Comparison of the structures and the mechanical responses of the two polymorphs revealed that the thermosalient effect of form I was due to reversible closing and opening of the arms of the diester molecules in a tweezer-like action.1 aTamboli, Majid, I.1 aKarothu, Durga, Prasad1 aShashidhar, Mysore, S.1 aGonnade, Rajesh, G.1 aNaumov, Pance  uhttps://library.ncl.res.in/content/effect-crystal-packing-thermosalient-effect-pincer-type-diester-naphthalene-23-diyl-bis4