title: Comment on the paper "Synthesis, growth, structural, spectral, thermal, chemical etching, linear and nonlinear optical and mechanical studies of an organic single crystal 4-chloro 4-nitrostilbene (CONS): a potential NLO material" by P.M. Dinakaran, S. Kalainathan [Spectrochim. Acta A 111 (2013) 123-130].
abstract: We argue that (trans)-4-chloro-4'-nitrostilbene is not a new organic nonlinear optical material as claimed by Dinakaran and Kalainathan [P.M. Dinakaran, S. Kalainathan, Synthesis, growth, structural, spectral, thermal, chemical etching, linear and nonlinear optical and mechanical studies of an organic single crystal 4-Chloro 4-Nitrostilbene (CONS): a potential NLO material, Spectrochim. Acta A 111 (2013) 123-130], but instead a well-known compound whose synthesis, spectral data, single crystal structure and second harmonic generation (SHG) efficiency are well documented in the literature. The title paper is completely erroneous.
authors.affiliation: Department of Chemistry, Goa University, Goa 403206, India. Electronic address: srini@unigoa.ac.in.
authors.forename: Bikshandarkoil R
authors.initials: BR
authors.lastname: Srinivasan
authors.forename: Sunder N
authors.initials: SN
authors.lastname: Dhuri
authors.forename: V S
authors.initials: VS
authors.lastname: Nadkarni
mesh_terms: D055595:Mechanical Phenomena; D017711:Nonlinear Dynamics; D055620:Optical Phenomena; D013267:Stilbenes / Q000138:chemical synthesis* / Q000737:chemistry*; D013696:Temperature
chemical_list: D013267:Stilbenes
keywords: (Trans)-4-Chloro-4′-nitrostilbene; Crystal structure; Dubious claim; Erroneous publication; Nonlinear optical material; Second harmonic generation