Chemistry of Succinylsuccinic Acid Derivatives. Part II. The crystal and molecular structure of diethyl succinylsuccinate

Abstract

Summary. X-ray structure analysis of the title compound (I) is reported. The results are interpreted to predict formation of anti-tricyclo[4.4.01~6.O7~12]-1,4,7,1O-tetraethoxycarbony1-3, 6,9,12-tetrahydroxy-dodeca-3,9-diene on UV.-irradiation of solid (I). [4], and inspection of the molecular packing in the crystal with regard to possible topochemical reactions [5] suggested the possibility of photodimerization in the triclinic modification.Recrystallization of the title compound (DESS, I) from different solvents yielded only triclinic crystals. In order to understand their susceptibility to topochemical reactions and to obtain precise geometric parameters for the DESS molecule, the present X-ray structure determination was performed. It promised, moreover, an insight into the structure of the eventual photoproducts.

Chemistry of Succinylsuccinic Acid Derivatives. Part I. On the photodimerization of diethyl succinylsuccinate

“…From the crystal packing of DESS a 'head to tail' configuration was predicted for the photodimer [14]. This was indeed confirmed by a crystal structure analysis of the photoproduct [15].…”

Structures of zinc(II) with tetradentate N2S2 ligation

“…MS2 ( (4) 2.047 (2) 2.059 ( 1978) or slightly puckered (Bennett & Purdham, 1978;Mez & Rihs, 1973). As indicated in (8), which shows deviations from the least-squares plane defined by the vinyl C atoms, the cyclohexadiene ring in Zn(3) is planar only to ___0.07 fit.…”

Crystal structure of dipentyl 2,5-dihydroxycyclohexa-1,4-diene-1,4-dicarboxylate, C18H28O6

“…The asymmetric unit contains one half of a title molecule, located around an inversion center (see the figure). The single crystal structure verifies that all bond lengths and bond angles are within the normal range [10]. Two intramolecular OH• • • O hdrogen bonds are present.…”