The β-form of trans-3-(2-nitrophenyl)prop-2-enoic acid at 130 K

Abstract

Key indicatorsSingle-crystal X-ray study T = 130 K Mean (C-C) = 0.009 Å R factor = 0.063 wR factor = 0.111 Data-to-parameter ratio = 6.4For details of how these key indicators were automatically derived from the article, see

Polymorphism in a trans-Cinnamic Acid Derivative Exhibiting Two Distinct β-type Phases: Structural Properties, [2 + 2] Photodimerization Reactions, and Polymorphic Phase Transition Behavior

“…The crystal structures of β polymorphs of simple trans -cinnamic acid derivatives are found to fall into two general structure types: a monoclinic group and a triclinic group. In the monoclinic group, there are two orientations of the molecular planes, and examples in this group are trans -cinnamic acid, 4-formyl -trans -cinnamic acid, 2-fluoro- trans -cinnamic acid, 4-fluoro- trans -cinnamic acid, 3-nitro- trans -cinnamic acid, 3-bromo- trans -cinnamic acid, and 2-nitro- trans -cinnamic acid . In the triclinic group, the planes of all molecules are parallel to each other; this group includes 3-chloro- trans -cinnamic acid and 2-bromo- trans -cinnamic acid…”

Template-Directed Photochemical [2 + 2] Cycloaddition in Crystalline Materials: A Useful Tool to Access Cyclobutane Derivatives

“…As shown in Scheme , a series of carboxylic acid substituted olefins could undergo [2 + 2] photodimerization in the solid state to produce corresponding cyclobutane products with the assistance of suitable templates. − trans -Cinnamic acid ( 47a ) could be assembled using a double salt of diamines and underwent [2 + 2] photodimerization in the solid state to mainly give β-truxinic acid ( 48a ′) . Similarly, trans -2,4-dichlorocinnamic acid reacted with the diamine double salt of 1,2- trans -diaminocyclohexane to give a β-dimer via [2 + 2] photodimerization .…”

Methyl (Z)-2-chloro-3-(2-methoxycarbonylphenyl)prop-2-enoate

“…For the structure of 2-nitrocinnamic acid, in which the alkene group is noncoplanar with the aromatic ring, as in the title compound, see: Smith et al (2006). For numerous structures of cinnamic acid derivatives, with coplanar aromatic and alkene groups, see: ethyl p-methoxycinnamate (Luger et al, 1996), p-cresyl cinnamate (Kaitner & Stilinović, 2007), 4-methylcoumarin ester of trans-cinnamic acid (Yang et al, 2006), methyl esters of m-and p-bromocinnamic acids (Leiserowitz & Schmidt, 1965), methyl 3,5-dinitro-trans-cinnamate (Sharma et al, 1995), N-cinnamoylsaccharin (Ersanlı et al, 2005), and 2-ethoxycinnamic acid (Fernandes et al, 2001).…”