15N NMR spectroscopy unambiguously establishes the coordination mode of the diimine linker 2-(2′-pyridyl)pyrimidine-4-carboxylic acid (cppH) in Ru(ii) complexes

2015 ◽  
Vol 44 (35) ◽  
pp. 15671-15682 ◽  
Author(s):  
Federica Battistin ◽  
Gabriele Balducci ◽  
Nicola Demitri ◽  
Elisabetta Iengo ◽  
Barbara Milani ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Carboxylic Acid ◽  
Coordination Mode ◽  
Chemical Shifts ◽  
Natural Abundance ◽  
15N Nmr ◽  
Nmr Chemical Shifts ◽  
15N Nmr Spectroscopy ◽  
N Natural Abundance

The 15N NMR chemical shifts, obtained through {1H,15N}-HMBC spectra at 15N natural abundance, unambiguously establish the coordination mode of cppH (viaNo or Np) in a series of Ru(ii) compounds.

Some Applications of Ultrahigh Resolution 15N NMR Spectroscopy

1998 ◽  
Vol 53 (4) ◽  
pp. 411-415 ◽  
Author(s):  
Bernd Wrackmeyer ◽  
Ēriks Kupče
Keyword(s):  
Nmr Spectroscopy ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Absolute Magnitude ◽  
Natural Abundance ◽  
Coupling Constants ◽  
15N Nmr ◽  
Ultrahigh Resolution ◽  
Tert Butyl ◽  
15N Nmr Spectroscopy

Abstract Ultrahigh resolution 15N NMR spectra were measured for two nitroalkanes (MeNO2 la, tBuNO2 1c), two isocyanates (tBuNCO 2c, Me3SiNCO 2d), four isothiocyanates (MeNCS 3a, EtNCS 3b, tBuNCS 3c, Me3SiNCS 3d), one carbodiimide (Me3SiNCNSiMe3 4d), one keteneimine [Me3SiNCC(SiMe3)2 5d], two sulphinyl imides (tBuNSO 6c, Me3SiNSO 6d), and N-tert-butyl-pyrrole 7c, in order to determine coupling constants J(15N ,I3C) and isotope induced chemical shifts 1∆12/13C (15N) at the natural abundance of the isotopes. The values 1∆12/13C (15N) can be separated into two groups, one dealing with NC single and another one with NC double bonds. In each group (with few exceptions), the values 1∆12/13C (15N) become more negative with a decrease in the absolute magnitude of l1J(l5N ,13C)l. The corresponding values 1∆14/15N (13C) show a sim ilar behaviour. However, N-substituted pyrroles appear to be exceptional in this respect.

Observing individual generations in poly(propyleneimine) dendrimers with natural abundance 15N-NMR spectroscopy

2010 ◽  
Vol 113 (12) ◽  
pp. 573-574 ◽  
Author(s):  
Marcel H. P. van Genderen ◽  
Maurice W. P. L. Baars ◽  
Jan C. M. van Hest ◽  
E.W. Meijer ◽  
Ellen M. M. de Brabander-van den Berg
Keyword(s):  
Nmr Spectroscopy ◽  
Natural Abundance ◽  
15N Nmr ◽  
15N Nmr Spectroscopy ◽  
Natural Abundance 15N

Application of Reverse Two-Dimensional 1H{15N} NMR Spectroscopy to the Characterization of Two Inorganic Compounds:

1987 ◽  
Vol 42 (6) ◽  
pp. 703-706 ◽  
Author(s):  
Bernd Wrackmeyer ◽  
Klaus Schamel ◽  
Karlheinz Guldner ◽  
Max Herberhold
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shifts ◽  
Inorganic Compounds ◽  
Ring System ◽  
Coupling Constants ◽  
15N Nmr ◽  
Two Dimensional ◽  
Hydrogen Atoms ◽  
15N Nmr Spectroscopy

AbstractThe inorganic ring system linked to the [Cr(CO)5] fragment [R = tBu (1), NH2 (2)], has been studied by reverse two-dimensional, 2D, 1H{15N} NMR spectroscopy. In solution, the exchange of the N-H hydrogen atoms is slow on the NMR time scale. Chemical shifts δ(1H), δ(13C), δ(31P), δ(15N) and coupling constants 1J(31P1H), 2J(31P13C), 1J(31P15N) are reported. In the case of 2, the reduced coupling constants 2K(31PN1H) and 1K(31P15N) have the same sign.

scholarly journals 15N—NMR-Spektroskopie bei Stickstoffwasserstoffsäure und Chlorazid / 15N NMR Spectroscopy at Hydrazoic Acid and Chlorine Azide

1978 ◽  
Vol 33 (9) ◽  
pp. 993-996 ◽  
Author(s):  
Joachim Müller
Keyword(s):  
Nmr Spectroscopy ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Coupling Constants ◽  
15N Nmr ◽  
Hydrazoic Acid ◽  
15N Nmr Spectroscopy

The 15N NMR spectra of HN3 and CIN3 solutions were recorded under triply labelled conditions. The chemical shifts and coupling constants are discussed with respect to the structure and in relation to other isoelectronic compounds.

Synthesis of cyano(selenone)gold(I) complexes and investigation of their scrambling reactions using 13C and 15N NMR spectroscopy

Polyhedron ◽  
2002 ◽  
Vol 21 (21) ◽  
pp. 2099-2105 ◽  
Author(s):  
Saeed Ahmad ◽  
Anvarhusein A. Isab ◽  
Abdul Rahman Al-Arfaj ◽  
Alan P. Arnold
Keyword(s):  
Nmr Spectroscopy ◽  
15N Nmr ◽  
15N Nmr Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document