Diethyl phthalate crystal structure

Systems copolymer SEO/diethyl phthalate of different concentration have been studied by DSC and low-angle X-ray diffraction as a function of the crystallization temperature. It has been found that for a fixed concentration the characteristic parameters of the LC structure vary stepwise. For instance, for a diethyl phthalate concentration of 10%, the thickness dB of the PEO layer increases suddenly when the crystallization temperature reaches 19°, 29° and 42 °C and each jump of the dB parameter corresponds to a decrease by one of the average number v of folds of PEO chains265. An example of the phase diagram crystallization temperature/solvent concentration is given in Fig. 36 for the copolymer SEO 4 whose molecular parameters are summarized in Table 8. The degree of crystallinity of the PEO chains increases with both the crystallization temperature and solvent concentration265. ... 

Some crystal structures of chelate complexes have been reported. An O-acryloyl-lactate-TiCU complex (Fig. 3) [26,27] has rare out-of-plane (Fig. 4) coordination of the acryloyl carbonyl group to the titanium a further study has been conducted [28]. Diethyl phthalate-TiCU [29], l,2-diketone-TiCl4 [25], and achiral [24] or chiral [30] acyloxazolidinone-TiCU complexes have been reported to involve in-plane coordination as shown in Fig. 5. The /S-alkoxyketone-TiCU complex shown in Fig. 6 [31] is characterized by a rare out-of-plane coordination geometry (dihedral bond angle of... 

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