Kristallstruktur des Kaliumsalzes des 1,2‐Dithiooxalsäure‐S‐methylesters, K[COSCOSCH₃]

Abstract

eine trans-koplanare Konformation ein. Eine Ausnahme mit einer nahezu planaren cis-Konfiguration bildet wegen der extremen Raumbeanspruchung der Alkylgruppen der Oxalsaure-bis(di-tert-butylmethylester)8).

Butanedithiol diacetate

“…The structural parameters of (I) agree well with those found for other compounds containing an S-acetyl moiety (Fleischer & Schollmeyer, 2001;Evans et al, 1999;Divjakovic  et al, 1992;Mackay et al, 1992;Huber et al, 1984;Mattes & Waldmann, 1983;Mattes et al, 1977;Kiel et al, 1974). This implies that the S-acetyl fragment is a relatively rigid structural unit, a hypothesis supported by an analysis of the bonding situation in terms of natural bond orbitals (Fleischer & Schollmeyer, 2001).…”

Precise structural information for transient enzyme-substrate complexes by a combined x-ray crystallographic-resonance Raman spectroscopic approach

“…In conformer B, despite the close contact distance N(1 )-S(l), the bond angles about the thiocarbonyl group indicate no significant deformations due to steric repulsion between these atoms. Indeed, the value for the S(l)-C(3)-C(4) bond angle of 114.2(4)°i s typical for corresponding bond angles in unhindered dithioesters [112.5°(Adiwidjaja & Voss, 1977a)] and thiol esters [113.0° ; 115° ( Mattes et al, 1977); 112.1° ( Guy & Hamor, 1974)].…”

Structure of tetrabutylammonium μ-oxo-μ-sulfido-bis[(1,2-dithiosquarato-S,S')oxomolybdate(V)]

“…H20 completely. A comparison of these parameters with those of the 1,2-dithiooxalate ion (Mattes & Meschede, 1976) or the S-methyl-l,2-dithiooxalate ion (Mattes, Meschede & Niemer, 1977) seems to be adequate. Here d(CS) and d(CO) vary between 1.69-1.70 A and 1.21-1.22 A respectively.…”