Caswell, Lyman R.; Soo, Lily Y.; Lee, Daisy H.; Fowler, Rosemary G.; Campbell, Jo Anne B. published the artcile< Dipole moments of some 3- and 4- substituted phthalimides and phthalic anhydrides. Influence of steric and resonance effects>, Quality Control of 118-45-6, the main research area is dipole moment phthalimide phthalic anhydride.
The dipole moments of phthalimide, phthalic anhydride, and 16 derivative compounds in dioxane solution were measured and compared. The predicted moments of the derivatives were also calculated from group moments. There is good agreement between the exptl. and predicted dipole moments only for 3-methylphthalic anhydride, 3-fluorophthalimide, 4-methylphthalimide, 3-fluorophthalic anhydride, and 4-methylphthalic anhydride. The Zhdanov-Minkin equation for calculating resonance interaction moments was applied for all of the derivatives Arguments are presented for designating the numerical results of this calculation as ring polarization moments. The results of these calculations show that interaction resonance is significant only for 4-chlorophthalic anhydride. Steric and resonance effects are both small or absent as influences on the dipole moments of 3-fluorophthalic anhydride, 3-fluorophthalimide, and of all methyl derivatives Steric interaction between ortho substituents appears to be large only in the cases of 3-nitrophthalimide and 3-nitrophthalic anhydride.
Journal of Organic Chemistry published new progress about Dipole moment. 118-45-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H3ClO3, Quality Control of 118-45-6.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics