Notizen: Innerkristalline Quellung und zeolithische Flüssigkeitsaufnahme von Calcium-mono-n-propylphosphorsäureester

Abstract

The complex [Cu(en) 2 (H 2 O)](sy) 2 (en)(H 2 O) 2 has been synthesized and characterized by its electronic and vibrational spectra. The molecular structure of the complex has been determined by X-ray diffraction methods. The complex crystallizes in the orthorhombic space group Pnma with unit-cell parameters a = 10.7236 (5), b = 20.4660(10), c = 14.4523(11)Å and Z = 4. In the cation, the Cu(II) ion has a distorted square pyramidal coordination with two bidendate (en) ligands forming the basal plane and a H 2 O molecule in the apical position. The complex cations and syringate anions constitute chains along the b axis in -A-B-A-fashion. The members of the chains are linked by through N-H···O hydrogen bonds. The (en) molecules are responsible for connecting adjacent layers.

Kink‐Block and Gauche‐Block Structures of Bimolecular Films

“…Nevertheless, they show the order of magnitude, which is surprisingly low. In close-packed polyethylene the defect energy of a kinked alkyl chain is 7-1 1 kcal/mol (29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46) kJ.mo1-I); by aggregation of the defects it falls to half this value ( Table 3) The observed defect energy is still lower than this value. Since the basal spacing decreases on the formation of kinkblocks, for infinitely large layers the volume decreases and the packing density increases.…”