Theophylline cadmium complexes

Tetraaza macrocycles nickel complexes, S Tetragonality copper(II) complexes, 603 Theophylline cadmium complexes, 957 Thermolysin zinc, 1006 Thiabendazole metal complexes, 951 Tollen s reagent, 780 Transcription DNA polymerases, 1007 Trans effect... 

A structure determination of CdL(H20)5 3H20 (L = guanosine-5 -phosphate) reveals a cadmium ion octahedrally coordinated by live water molecules and the N-7 of the purine ring system (Cd—N = 2.37 A Cd—O = 2.24-2.34 A).568 Similarly, a structure determination of CdL2(H20)4 (L = 8-azahypoxanthinato) reveals octahedral cadmium bonded to N-7 of the purine anions and to four water molecules.569 Theophylline (83) is frequently used as a substitute for guanine (84) in model systems, and the complexes [CdI (RNH2)2(H20)2] (L = 83) have been described.570... 

Very little structural information is available for cadmium(II) complexes with neutral oxopurines. Nevertheless, the basicity of the N-donors in this kind of oxopurine ligand, as well as the softness, increases after the dissociation of at least one of the protons. Consequently, most of the available crystal data concerning complexes of such ligands refer to the tmivalent anions of hypoxanthine (Hhyp), xanthine (Hxan) or theophylline (Htheo). Neutral hypoxanthine yields the compound [Cd2(p2-N3,N9-H(N7)hyp)2(p2 H20)2(S04)2(H20)2] [27], in which the... 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ , ]

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