Bis(purine) Complexes of trans-a2PtII: Preparation and X-ray Structures of Bis(9-methyladenine) and Mixed 9-Methyladenine, 9-Methylguanine Complexes and Chemistry Relevant to Metal-Modified Nucleobase Triples and Quartets J. Am. Chem. Soc. 1996, 118, 4124−4132
| Autor: | André Schreiber, Andrea Erxleben, Marc Sven Lüth, and Edda C. Fusch, Bernhard Lippert |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Purine
Hydrogen bond Stereochemistry X-ray General Chemistry Biochemistry Catalysis Nucleobase Metal 9-methylguanine chemistry.chemical_compound Colloid and Surface Chemistry chemistry Group (periodic table) Computational chemistry Intramolecular force visual_art visual_art.visual_art_medium Purine metabolism |
| Zdroj: | Journal of the American Chemical Society. 121:3248-3248 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja9955013 |
| Popis: | Mononuclear bis(purine) complexes of trans-a2PtII, trans-[(NH3)2Pt(9-MeA-N7) (9-MeGH-N7)](NO3)2·H2O (1b) and trans-[(NH3)2Pt(9-MeA-N7)2](ClO4)2·H2O (3c), have been prepared and their structures determined by X-ray crystallography. 1b: Space group P1, a = 7.245 (5) A, b = 7.715(6) A, c = 10.907(8) A, α = 82.36(6)°, β = 86.62(6)°, γ = 70.15(6)°, V = 568.3(7) A3, Z = 1. 3c: Space group P21/c, a = 8.312(2) A, b = 15.386(3) A, c = 12.365(2) A, β = 94.83(3)°, V = 1575.72(55) A, Z = 2. The cation of 3c is centrosymmetric. In the cation of 1b, the two purines adopt a head−head orientation with an intramolecular H bond of 2.94(3) A between the exocyclic amino group of 9-MeA and the exocyclic carbonyl group of 9-MeGH. Di- and trinuclear derivatives of 1b and 3c have been synthesized and/or studied in solution. They include compounds of types Cl•N1-A-N7•GH (2a), T•N1-A-N7•GH (2b), GH•N1-A-N7•T (2c), and GH•N7-A-N1•N1-A-N7•GH (2d) as well as X•N1-A-N7•N7-A-N1•X (X = Cl (4), GH (5a), T (5b)) with • representing tran... |
| Databáze: | OpenAIRE |
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