Combined application of auto-correlated (COSY) and homonuclear J-resolved two-dimensional NMR spectra for the assignment of congested, non-first order spectra of polycyclic aromatic systems. Assignment of the1H-NMR spectrum of benzo[2,3]phenanthro-[4,5-bcd]thiophene and an investigation of long range1H-1H spin-coupling constants

1984 ◽  
Vol 21 (1) ◽  
pp. 225-233 ◽  
Author(s):  
M. J. Musmar ◽  
Robert T. Gampe ◽  
Gary E. Martin ◽  
W. John Layton ◽  
Stanford L. Smith ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Two Dimensional ◽  
Nmr Spectrum ◽  
First Order ◽  
Combined Application ◽  
Polycyclic Aromatic ◽  
Spin Coupling Constants ◽  
Aromatic Systems

NMR spectra, MO calculations of spin-spin coupling constants and conformational analysis of substituted 1,3-dioxolanes

1980 ◽  
Vol 13 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Rois Benassi ◽  
Luisa Schenetti ◽  
Ferdinando Taddei ◽  
Luigi Villa ◽  
Vincenzo Ferri
Keyword(s):  
Conformational Analysis ◽  
Nmr Spectra ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Mo Calculations ◽  
Spin Coupling Constants ◽  
Spin Spin Coupling

Anwendung der 15N-NMR-Spektroskopie zur Charakterisierung reaktiver, koordinativ ungesättigter Zinn-, Bleiund Phosphor-Stickstoff-Verbindungen / Application of 15N-NMR Spectroscopy to the Characterization of Reactive, Coordinatively Unsaturated Tin-, Lead- and Phosphorus-Nitrogen Compounds

1987 ◽  
Vol 42 (12) ◽  
pp. 1515-1519 ◽  
Author(s):  
Carin Stader ◽  
Bernd Wrackmeyer
Keyword(s):  
Nmr Spectra ◽  
Pulse Sequence ◽  
Coupling Constants ◽  
Spin Coupling ◽  
15N Nmr ◽  
Nmr Data ◽  
15N Nmr Spectroscopy ◽  
Spin Coupling Constants ◽  
Spin Spin Coupling

AbstractThe basic INEPT pulse sequence proved most useful for recording 15N NMR spectra at natural abundance of bis(amino)stannvlenes (1). -plumbylenes (2) and of imino-amino-λ2-phosphanes (3), where the nitrogen atoms carry bulky substituents like Me3Si-, t-Bu-, 2.4.4-trimethyl-2- pentyl-groups (t-Oct-groups) or are part of the 2.2.6.6-tetramethylpiperidinyl group. The sensitiv­ity of this technique is proved by the observation of 117/119Sn or 207Pb satellites owing to spin-spin coupling constants 1J(117/119Sn15N) and 1J(117/119Pb15N), respectively. NMR data of bis[bis(trimethylsilyl)methyl]tin (4) are reported in order to corroborate the arguments for the interpretation of the δ(15N) and 1J(119Sn15N) data. The 15N NMR data of the λ2-phosphanes (3) indicate a bonding situation similar to that in triazenes.

Nuclear Magnetic Resonance Spectrum of 1-Hydroxy-2,3-Epoxypropane

1968 ◽  
Vol 22 (6) ◽  
pp. 773-776
Author(s):  
A. Leifer ◽  
H. L. Goldstein
Keyword(s):  
Resonance Spectrum ◽  
Chemical Shifts ◽  
Internal Standard ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Pure Liquid ◽  
Nmr Spectrum ◽  
Hydroxyl Proton ◽  
Spin Coupling Constants ◽  
Experimental Values

The NMR spectrum of pure liquid 1-hydroxy-2,3-epoxypropane has been analyzed quantum mechanically. The analysis is greatly simplified by treating the protons on the propane chain as two separate ABX systems. The chemical shifts at 60 Mcps, relative to the internal standard tetramethylsilane (TMS), and the spin coupling constants were found to be vA = 168.1 cps, vB = 160.5 cps, vX = 188.8 cps, vA' = 232.2 cps, vB' = 212.8 cps, JAB = 5.2 cps, JA'B' = 12.7 cps, JXA = 4.5 cps, JXA' = 2.9 cps, JBX = 2.7 cps, JB'X = 5.3 cps. Using these parameters the calculated frequencies of the spectrum are in excellent agreement with the experimental values. The chemical shift of the hydroxyl proton was found to be 266.8 cps downfield from TMS.

scholarly journals Sixteen 13C-19F Spin-Spin Coupling Constants in the 13C NMR Spectrum of 1-Fluoropyrene (C16H9F).

1972 ◽  
Vol 26 ◽  
pp. 2159-2161 ◽  
Author(s):  
A. Berg ◽  
P. E. Hansen ◽  
H. J. Jakobsen ◽  
H. A. Øye ◽  
Sigfrid Svensson
Keyword(s):  
13C Nmr ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Nmr Spectrum ◽  
Spin Coupling Constants ◽  
Spin Spin Coupling
Sign in / Sign up

Export Citation Format

Share Document