Single crystal X-ray crystallography

An extended bipyridinic ligand was synthesized by Tykwinski (34) and was shown by H NMR spectroscopy and single crystal X-ray crystallography to axially coordinate to two Ru(II)(CO) porphyrins (26, Fig. 7). 

The elucidation of the structure of the phthalocyanines followed some pioneering research into the chemistry of the system by Linstead of Imperial College, University of London. The structure that we now recognise was first proposed from the results of analysis of a number of metal phthalocyanines, which provided the molecular formulae, and from an investigation of the products from degradation studies. Finally, Robertson confirmed the structure as a result of one of the classical applications of single crystal X-ray crystallography. 

Methyl pyruvate thiosemicarbazone in the presence of zinc chloride or acetate resulted in the formation of complexes with the ligand hydrolyzed or transesterified. The complexes with pyruvate thiosemicarbazone, ZnL2, or ethyl pyruvate thiosemicarbazone, ZnLCl2 were structurally characterized by single-crystal X-ray crystallography showing respectively a distorted octahedral and distorted square pyramidal geometry.874... 

When tetrabromide 41 was treated with an excess of MeLi/LiBr in cyclohexene as a trap for carbenoids and carbenes, adduct 43 was obtained in 4% yield. In addition, 44 was isolated in 3% yield. The main product, however, was tetrabro-mide 45, whose yield amounted to 32%. The structure of 45 was established by single crystal X-ray crystallography.18... 

During the very first series of studies using single-crystal x-ray crystallography to determine the structures of organic molecules, Robertson reported the structure of resorcinol (1,3-dihydroxybenzene) [25]. This crystalline material corresponded to that ordinarily obtained at room temperature, and was later termed the a-form. Shortly thereafter, it was found that the a-form underwent a transformation into a denser crystalline modification (denoted as the P-form) when heated at about 74°C,... 

Solid-State Studies Phase Transitions and Thermochromism 3.11.5.3.1 Single crystal X-ray crystallography... 

Single crystals of the bis-ammonia adduct of 5, [(HC=C)4Zn]K2(NH3)2 (6), were obtained by crystallization from liquid ammonia at 195 K and special equipment was used to isolate the crystals at low temperature. The solid state structure of 6 was determined by single-crystal X-ray crystallography (Figure 4). Its solid state structure, a... 

A very large number of mixed metal aluminium amides has been reported. The majority are lithium-aluminium amide salts that exhibit a variety of different structures. Only a small number of ese compounds are discussed here.39,52,57,72,118-138 simplest is LiAl-(NH2)4 produced from the reaction of lithium and aluminium in liquid ammonia at 80 to 100 °C. The atomic arrangement of LiAl(NH2)4 has been studied by IR-spectroscopy and single crystal X-ray crystallography and was found to be a new variant of the GaPS4-type structure. 

MCM-41 was prepared under hydrothermal conditions using literature procedures [7], with a cetyltrimethylammonimum bromide as a template. The identity of the product was confirmed by powder XRD. Cu6(TePh)6(PEtPh2)s was prepared using the literature method [6]. The structure was verified using single crystal X-ray crystallography. 

It was determined by single crystal X-ray crystallography that (—(-praziquantel enantiomer has (R) absolute configuration (09PLN1). 

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