메뉴 건너뛰기




Volumn , Issue 12, 2008, Pages 2167-2174

Preparation and crystal structures of purine 2,2′-, 6,6′-, and 8,8′-dimers

Author keywords

Copper; Dimerization; Nitrogen heterocycles; Nucleobases; X ray diffraction

Indexed keywords


EID: 53749096664     PISSN: 1434193X     EISSN: 10990690     Source Type: Journal    
DOI: 10.1002/ejoc.200800017     Document Type: Article
Times cited : (8)

References (28)
  • 13
    • 0035843313 scopus 로고    scopus 로고
    • See the Supporting Information accompanying: C. Savarin, J. Srogl, L. S. Liebeskind, Org. Lett. 2001, 3, 91-93.
    • See the Supporting Information accompanying: C. Savarin, J. Srogl, L. S. Liebeskind, Org. Lett. 2001, 3, 91-93.
  • 14
    • 53749101622 scopus 로고    scopus 로고
    • Additional interactions of the bromide ions with the H(8) atom: C(8)-H(8)⋯Br, C(8)⋯Br 3.604(5) Å, angle at H(8) 143°; were not considered, as the C(8)⋯Br distance exceeds the sum of the contact radii (ca. 3.55 Å).
    • Additional interactions of the bromide ions with the H(8) atom: C(8)-H(8)⋯Br, C(8)⋯Br 3.604(5) Å, angle at H(8) 143°; were not considered, as the C(8)⋯Br distance exceeds the sum of the contact radii (ca. 3.55 Å).
  • 15
    • 53749090028 scopus 로고    scopus 로고
    • A search in Cambridge Structural Database (version 5.24 of November 2004 with updates of February, May and August 2005) revealed a rather low ability of bromide ions to attract water molecules into the organic crystals. Among 3923 structures of bromide salts with organic cations, only about 8% feature water molecules in distances suitable for O-H⋯Br hydrogen bond formation.
    • A search in Cambridge Structural Database (version 5.24 of November 2004 with updates of February, May and August 2005) revealed a rather low ability of bromide ions to attract water molecules into the "organic" crystals. Among 3923 structures of bromide salts with organic cations, only about 8% feature water molecules in distances suitable for O-H⋯Br hydrogen bond formation.
  • 16
    • 53749105148 scopus 로고    scopus 로고
    • The corresponding hydrogensulfate salt, which was obtained as described for the bromide except that 1 mL of 96% H2SO4 was used, crystallizes with one water molecule per diprotonated bis(purine) unit. However, in regard to the arrangement of the organic part and distribution of the anions, the structures of both salts can be considered isostructural. Crystallographic data for [1aH2](HSO4) 2·H2O ≡ (C24H20N 8)(HSO4)2·H2O: tetragonal, I41/a (no. 88, a, b, 30.364(1) Å, c, 5.9130(1) Å; V, 5451.6(3) Å3, Z, 8. CCDC-672187
    • 3, Z = 8. CCDC-672187.
  • 28
    • 53749106388 scopus 로고    scopus 로고
    • A. L. Spek, Platon: A Multipurpose Crystallographic Tool, Utrecht University, The Netherlands, 2003 and updates. Distributed via: http://www.cryst.chem.uu.nl/platon/
    • A. L. Spek, Platon: A Multipurpose Crystallographic Tool, Utrecht University, The Netherlands, 2003 and updates. Distributed via: http://www.cryst.chem.uu.nl/platon/


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.