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Volumn 9, Issue 18, 2003, Pages 4523-4535

Scalar coupling between the 15N centres in methylated 1,8-diaminonaphthalenes and 1,6-diazacyclodecane: To what extent is 2HJNN a reliable indicator of N-N distance?

Author keywords

Density functional calculations; Hydrogen bonds; NMR spectroscopy; Solvent effects; Spin spin coupling

Indexed keywords

COMPUTER SIMULATION; HYDROGEN BONDS; NITROGEN; SOLUTIONS;

EID: 0141757141     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/chem.200304890     Document Type: Article
Times cited : (22)

References (72)
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    • a) H. A. Staab, T. Saupe, Angew. Chem. 1988, 100, 895; Angew. Chem. Int. Engl. Ed. 1988, 27, 865;
    • (1988) Angew. Chem. Int. Engl. Ed. , vol.27 , pp. 865
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    • note
    • 3 without noticeable effect on yield or rate.
  • 34
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    • note
    • 3) in one pot.
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    • note
    • 2]-3 prior to protonation. The values obtained by simulation are given in Table 3.
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    • note
    • We were unable to locate a commercial source of anhydrous HI solution. Instead it was prepared in situ by metathesis of excess NaI with HCl in MeCN (in which NaI is fairly soluble but NaCl is not) and then precipitation of excess NaI by addition of diethyl ether.
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    • 0141430342 scopus 로고    scopus 로고
    • note
    • 1H}NMR spectrum.
  • 38
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    • note
    • +.
  • 39
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    • 2HJ(C,N) type coupling. However, in solution such interaction (if present at all) is transient as it is well known that enantiotopic methyl groups in 6 (see R. W. Alder, J. E. Anderson, J. Chem. Soc. Perkin Trans. 2 1974, 2086) and analogous systems undergo rapid interconversion at the NMR time scale. We suggest that instead, this phenomenon arises from a through-space coupling brought about by the timc-average proximity of the carbon and nitrogen centres during rapid interconversion of enantiomeric forms of 6.
    • (1974) J. Chem. Soc. Perkin Trans. 2 , pp. 2086
    • Alder, R.W.1    Anderson, J.E.2
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    • note
    • 18] for each compound.
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    • ADF2002.01, SCM, Theoretical Chemistry, Vrije Universiteit, Amsterdam, The Netherlands, http://www.scm.com
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    • For previous calculations on solvent effects on spin-spin coupling using microsolvated models, see ref. [50] and a) J. Autschbach, T. Ziegler, J. Am. Chem. Soc, 2001, 125, 3341;
    • (2001) J. Am. Chem. Soc. , vol.125 , pp. 3341
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    • Schrödinger, Inc., Portland, OR (USA)
    • Jaguar v4.1, Schrödinger, Inc., Portland, OR (USA), 1996, 2001.
    • (1996) Jaguar v4.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.