Conformations and structure studies of sugar lactones in the solid state. Part I. The molecular structure of l-rhamnono- and l-mannono-1,4-lactones

Standard molar enthalpies of formation of crystalline stereoisomers of aldono-1,4-lactones

“…The chemical compositions of the paraffin oil and the cotton were determined by an Elemental Analizator CHN/SO (Perkin Elmer 2400). The densities of Dga, Dgu and Lma were taken from crystallographic studies [11][12][13], the specific heat capacities, densities, variations of the massic energy with pressure, (ou/op) T , of cotton, paraffin oil and benzoic acid were taken of the indicated bibliography [14,15]; all the other values were estimated. The molar masses are base on 1999 IUPAC recommendations [16].…”

“…Until now it has not been possible to perform the sublimation of the studied aldonolactones, perhaps due to the existence of several intermolecular hydrogen bonds [11][12][13]. Because of this, the energies of formation in gas phase were not calculated.…”

5-O-Acetyl-D-ribono-1,4-lactone

“…For biocatalysed acylation reactions, see: Díaz-Rodríguez et al (2005); Wu et al (2008). For related structures, see: Shalaby et al (1994); Bye (1979); Amador et al (2004); Sá et al (2008); Gress & Jeffrey (1976). Data collection: CAD-4 Software (Enraf-Nonius, 1989); cell refinement: SET4 in CAD-4 Software; data reduction: HELENA (Spek, 1996); program(s) used to solve structure: SIR97 (Altomare et al, 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.…”