13C,15N,29Si and31P NMR study ofN-trimethylsilylaminophosphorus compounds: Sign determination of coupling constants and application of Hahn-echo extended pulse sequences

(1)The utilization of two-dimensional (2 D) 13C /1H , 31P/1H and 195Pt/1H heteronuclear shift correlations for the sign determination of various coupling constants [e.g., 2J(31PPt13C) > 0 (trans), 2J(31PPt13C) < 0 (cis), 3J( 31PPtC13C) > 0 (cis, trans), 4J(31PPtCC1H ) > 0 (trans), 4J(31PCC1H ) < 0 (cis), 3J(195PtCC1H ) > 0, 2J(31PC1H ) < 0, etc.] is demonstrated, using standard equipment. The complexes [trans-(Bu3P)2Pt(C ≡ C -H)2] and [cis-(Et2PCH2CH2PEt2)Pt(C ≡ C - H)2] (2) serve as model compounds.

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Application of INEPT to 13C NMR of alkynylmetal compounds and the convenient sign determination of coupling constants and by two-dimensional 13C/1H heteronuclear shift correlation

Journal of Magnetic Resonance (1969) ◽

10.1016/0022-2364(90)90063-f ◽

1990 ◽

Vol 90 (3) ◽

pp. 569-574 ◽

Cited By ~ 4

Author(s):

Bernd Wrackmeyer ◽

Klaus Horchler

Keyword(s):

13C Nmr ◽

Coupling Constants ◽

Two Dimensional ◽

Sign Determination

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Sign determination of coupling constants in CF2H and CF3 derivatives of silver(III)

Magnetic Resonance in Chemistry ◽

10.1002/(sici)1097-458x(199711)35:10<707::aid-omr153>3.0.co;2-0 ◽

1997 ◽

Vol 35 (10) ◽

pp. 707-711 ◽

Cited By ~ 8

Author(s):

Reint Eujen ◽

Berthold Hoge

Keyword(s):

Coupling Constants ◽

Derivatives Of ◽

Sign Determination

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Assignment and sign determination of (C, H) and (H, H) coupling constants inN-acetylimidazole with selective population inversion experiments

Organic Magnetic Resonance ◽

10.1002/mrc.1270130207 ◽

1980 ◽

Vol 13 (2) ◽

pp. 100-104 ◽

Cited By ~ 9

Author(s):

K. G. R. Pachler ◽

P. L. Wessels

Keyword(s):

Population Inversion ◽

Coupling Constants ◽

Selective Population ◽

Sign Determination

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Experimental aspects of the SLAP pulse sequence for sign determination of 13C-13C coupling constants

Journal of Magnetic Resonance (1969) ◽

10.1016/0022-2364(85)90167-2 ◽

1985 ◽

Vol 63 (1) ◽

pp. 189-192 ◽

Cited By ~ 4

Author(s):

J Lambert ◽

K Wilhelm ◽

M Klessinger

Keyword(s):

Pulse Sequence ◽

Coupling Constants ◽

Sign Determination

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Sign-Determination of Spin-Spin Coupling Constants in tert-Butylphosphaalkyne

Zeitschrift für Naturforschung B ◽

10.1515/znb-1992-0323 ◽

1992 ◽

Vol 47 (3) ◽

pp. 437-438

Author(s):

Bernd Wrackmeyer

Keyword(s):

Coupling Constants ◽

Spin Coupling ◽

Positive Sign ◽

Two Dimensional ◽

Tert Butyl ◽

Spin Coupling Constants ◽

Spin Spin Coupling ◽

Sign Determination

The signs o f the coupling constants 1J(31P≡13C) ( > O ) , J(31P13C) ( > O ) , 3J(31P13C) ( > O ) and 4J(31P1H) ( > O ) in tert-butyl-phosphaalkyne (1) were determined by selective 1H {31P} NMR experiments and two-dimensional (2 D ) 13C/1H heteronuclear shift correlations based on nJ(13C1H ) (n = 1,2,3), confirming the previously assumed positive sign of 1J( 31P≡13C) in phosphaalkynes.

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