SOLID-STATE CARBON-13 CP/MAS NMR SPECTRA OF 2, 2'-BI-1H-IMIDAZOLE

Comparison of the Solid State CPMAS and Solution Carbon-13-NMR Spectra of Humic Acids Extracted from Composted Municipal Refuse

The solution and CPMAS spectra of humic acids extracted from the composted municipal refuse of three Spanish cities (Sevilla, Granada and Puerto Real) have been obtained at 75.4 MHz. The spectra are discussed qualitatively and the signals assigned to the various chemical struc­ tures forming the humic acids. It is attempted to learn the limits for the quantitative determination of signal areas ...

2-Phenyl-1H-imidazole

In the title compound, C(9)H(8)N(2), a mirror plane lies perpendicular to the phenyl and imidazole rings and passes through the bridging C-C bond, so that the imidazole ring is disordered over two sites about the mirror plane with the equal site occupancy; the asymmetric unit contains one half-mol-ecule. In the crystal, adjacent mol-ecules are linked via N-H⋯N hydrogen bonds.

1H NMR spectra dataset and solid-state NMR data of cowpea (Vigna unguiculata)

In this article the NMR data from chemical shifts, coupling constants, and structures of all the characterized compounds were provided, beyond a complementary PCA evaluation for the corresponding manuscript (E.G. Alves Filho, L.M.A. Silva, E.M. Teofilo, F.H. Larsen, E.S. de Brito, 2017) [3]. In addition, a complementary assessment from solid-state NMR data was provided. For further chemometric ...

2 H - DNP - enhanced 2 H - 13 C solid - state NMR

2-(2-Thien­yl)-4,5-dihydro-1H-imidazole

In title compound, C(7)H(8)N(2)S, the five-membered rings are twisted by a dihedral angle of 5.17 (10)°. Two inter-molecular N-H⋯N and C-H⋯N hydrogen bonds to the same acceptor N atom form seven-membered rings, producing R(2) (1)(7) ring motifs. These inter-actions link neighbouring mol-ecules into one-dimensional chains extended along the c axis. The crystal structure is further stabilized by ...