Eight compounds of Rh coordinated catalyst are synthesized and measured by ¹H and ¹³C NMR. The spectral lines are assigned and some correlations are found. Some coupling constants are determined. The structures of these compounds are decided.
We found that a coordinated product of trans-effect is not a pure trans compound but a 2:1 (trans:cis) mixture of isomers.
When ligand is a β-diketone in solution, the structure of Rh-coordinated compound is somewhat distorted, especially the CH₃, group, CH₃ has its abnormal behavior both in ¹H and ¹³C NMR.

In this paper,¹H ¹³C, ³¹P NMR spectra of 6 phosphoramidothiolates of genera formula H₂N RS P=O-O-COOR'(R=methyl, ethyl, isopropyl,propyl;R'=methyl, ethyl, isopropyl) and two-dimensional ¹³C-¹H heteronuclear chemical shift correlation NMR spectroscopy were recorded. ¹H,¹³C, ³¹P chemical shifts and ¹H-¹H,³¹P-¹H,³¹P-¹³C different kinds of coupling contant were determined. The relations between of NMR parameters and molecular motion and between ³¹P chemical shifts and the insecticidal activity were discussed.

In this paper the S-electron densities of C and H atoms of N -CH₂-Rradicals in the nitrogen heterocyclic ring compounds have been calculated with EHMO program. The S_C·S_H is equal to 1.172 +0.006 for the series of pyridine salts and 1.162+0.015 for the series of carbazole. Experiments showed that the NMR coupling constants ¹J_CH are 144 +2Hz and 135 +2Hz respectively for the two series. Comparing the calculated rezults with the experimental data it can be explained that the ¹J_CH are not varied with exchanging of substituted radicals.

In this paper we will present some new results of NMR studies on DNAS and Histones.
NMR spectrai of eukaryotic DNAs was obvious different while was foud eukaryotic Histones was similar.
when actinomycin D was interacted with DNA, Ethidiumbromide was int-fracted with DNA, The proton peaks became weak and changes of chemical shifts was dicussed.

A Super-regenerative NQR Spectrometer has been described. The Super-regenerative oscillator constructed by field effect transistors works in wider frequency range and has higher sensitivity, The ³⁵Cl and ³⁷Cl NQR Spectra of Some shemical samples recorded with this spectrometer are shown in this paper, and the advantages of using field effect transistors for NQR are discussed.

The ¹³C total spin-lattice relaxation times and the NOE factors η_с of N-butyl aniline were measured at two temperatures by means of inversion recovery pulse sequences (180°-τ-90°T).The contributions of each relaxation mechanism were appreciated by calculation, the correlation times τ_с of molecular random movements were deduced, and the dynamic situation of the molecules was discussed.

The ²⁹Si and ¹³C NMR spectra of ten cyclodisilazane derivatives(R₁=Me,ф;R₂=Me,ф;R₃=Me;X=Me,ф,OH、OSiMe₃、Hand Cl) and nine related polymrfes(m=2,3,4,7 and 10)have been studied systematically. The effects of substituents X, R₁ R₂ and si-loxane chain length on chemcal shifts have also been discussed. The results show that there are (p-d)π interactions between N atom and three adjacent Si atoms in cyclodisilazanes.

The L-histidine copper(11) complex is one of the important components of thecopper-proteins. The electron paramagnetic resonance (EPR) Studies of C_x²⁺ located in the L-histidine C_u²⁺ complexes is very important for understandingthe processes of physiology and biochemistry related to the copper-proteins. In this article EPR technique has been used to study C_u²⁺ doped L-histidine single crystals at 4.2K. The EPR spectra of C_u²⁺ doped in single crystal of L-hisitidine hydrochloride monohydrate indicates that the C_x²⁺ ion is incorporated in a different environment from that in the ordinary L-histidine C_x²⁺ complex.
The ground state of C_u²⁺ doped L-histidine single crystal is a kramer's doublet state. The coefficients of this doublet state were determined from the observed g tenson and in such a way that the hyperfine coupling parameters of C_x²⁺ ion were calculated from these coefficients and a satisfactory agreement has been obtained between the calculated and the observed values.

The sequence and branching of polyvinylidene fluoride have been investigated by ¹⁹F FT-NMR and have been corr elated to solubility and heat stability.

This paper describes a highly stabilized magnet power supply system for magnetic resonance, which is capable of providing a field strenth of 2.35T in 6KW consumption. The main practical circuits and adjusted methods for stabilized system are given. The DC drift is about 5 part in 10⁷ per 5 minutes and 6 part in 10⁶ long-term(1h).

The sample rapid spinning about an axis inclined at "The Magic Angle", i.e.β_M=cos^-1(1)/√3 to the applied magnetic field(MAS)can eliminate many spe-ctral broadenings in solid NMR. The major anisotropic interactions in solids, namely Dipole-Dipole,Nuclear Quadrupole,Spin-spin or Indirect Dipole-dipole and Chemical Shift interaction and their effects on the NMR spectral broadening are reviewed firstly and then the influences of MAS on those interactions are treated by the averaging Hamiltonian theory.
MAS is the only one which can remove the shift anisotropy among the present high resolution methods in solid NMR,i.e. Multiple Pulses (MP).Multiple Quantum Transition (MQ), Cross Polarization and Heteronuclear High Power Decoupling (CP),and MAS itself as well. Consequently, MAS is the ultimate means for the liquid-like high resolution spectra in solids. The high resolution NMR in solids is now booming by the combinations of the above mentioned tech-niqes in a certain sense and by the wide spread applications of them.
Both the prime and the latest literatures are extensively reviewed and an effort is made to cover the most developments up to date,emphasizing the theoretical and the experimental aspects on the field in the paper.