The ¹H NMR and ¹³C NMR of arbutin, gastrodin and their derivatives were studied. The configurations of arbutin and their derivatives were assigned based on ¹H NMR and ¹³C NMR date of these compounds. The feature of the spectra of various configurations were indicated. We colud deduce that the configurations of gastrodin was β isomer from the obtained conclusion.

By use of SCF d-orbital theory and high order perturbation formulas for the zero-field splitting of d⁵ ion at low symmetry, the zero-field splitting of YAG:Mn²⁺ was calculated and a result with good agreement with the experiment. The difficulty which could not be overcome for years in the theory of EPR spectrum of YAG:Mn²⁺ has been solved.

The N-Arylmethacrylamides including N-Phenylmethacrylamide(N-PhMA), N-p-Tolylmelhacrylamide (N-p-TMA), N-o-Tolylmethacrylamide(N-o-TMA),N-p-Bromomethacrylamide(N-p-BrPhMA),N-p-Nitrophenylmethacrylamide (N-p-NPhMA), N-o-Nitrophenylmethacrylamide (N-o-NPhMA), were prepared via the acid route and the chemical shifts of these N-Arylmethacrylamide were determined (see Table 1) on a Varian FT-80A NMR spectrometer.
The substituent groups affect the chemical shifts of adjacent aryl protons as shown in Table 2. Since chemical shifts depends on the electron density around the aryl proton, the methyl group, which is a weak electron releasing group on the benzene ring, increases the electron density on the aryl proton thus will tend to cause an up-field shift; the nitro group, which is a strongly electron withdrawing group on the benzene ring, decreases the electron density on the aryl proton, thus will tend to cause a down-field shift. As an evidence the shifts dH are 7.54ppm, 7.44ppm, 7.76ppm for N-PhMA, N-p-TMA, and N-p-NPhMA, respectively.

In compounds N-o-NPhMA and N-o-TMA the protons labelled dH at lower fields than those in N-p-NPhMA and N-p-TMA, since the former lies in the deshielding zone of the carbonyl group.
This is illustrated below:

The values of the chemical shifts of the six kinds of N-Aryimcthacrylamide were estimated so as to obtain a good agreement between observed and calculated.

The compositions of sixteen diads of random butadiene-styrcne copolymers were calculated by using aliphatic carbon portion of the ¹³C-NMR spectra, based on the assignment in the previous paper. Compositions of the four monomer units deduced from the calculation were consistent with the results obtained from ¹H-NMR spectra. In the polymerization system, the average sequence lengths of diads and the average permanence ratio of four monomer units indicate that the styrcne unit (S) tends to form short block polymers, vinyl unit (v) shows a tendency to combine with the other three monomer units, trans-1, 4-butadiene unit (t) and cis-1, 4-butadiene unit (c) show tendency to form structures containing alternating units besides the block polymers formed from themselves. The results prove that ¹³C-NMR is a powerful tool for investigating the microstructure of butadiene-styrcne copolymers.

The assignment of protons in Lividomycin is difficult in the range 3.50-4.00ppm because of severe overlap of their signals. In this work, the RELAY-COSY, triple-RELAY COSY and the high resolution J-resolved spectrum were used and showed to be very useful for solving the problem described above. Furthermore, it provides a basis for elucidating the configuration and conformation of Lividomycin.

ESR method was used to study the properties of paramagnetic centers generated by γ-irradiating silica gel containing respectively phosphorus and boron as impurity ions. Oxygen holes O^- were found to be stablized close to impurity ions. In addition, O₂^- radical and F colour center signals were observed and investigated. A dynamic equilibrium process would exist during F centers formation.

The ester conformation of some synthetic pyrethroids were studied by ¹H-NMR with the rule of ASIS effect of carbonyl group, We found, if pyrethroid molecule had α-CN group, the α-CN and ester C=0 were coplanar:if it had α-CH₃, the α-H and ester C=0 were coplanar. Our experiments supported Hopfinger's results from calculation with molecular dynamics. Therefore, We confirmed tha the conformations of α-CN pyrethroidsin solution and orystal were different.

The EPR spectra of binuclear copper (Ⅱ) cluster
·4DMF (1)
in solide and solution at room temperature and 77K have been measured. Three groups of lines are observed. They are attributed to two station of the unpaired elec-tron, in the title compound respectively. One is similar to those of a mononuclcar copper sen which present spectra of groups Ⅰ and Ⅱ, while the spectrum of group Ⅲ manifests itself as a triplet state of two coppers coupling dimer.
In this paper, the EPR parameters for the triplet state of dimeric copper are calculated by spin Hamiltonian formula H_S=βHgS+DS_z²+E(S_x²-S_y²)-(2)/3D
By comparison of the title compound (1) with
·4DMF (2)
it is found that there are some differences in the ligand structure, i. e. the difference in the position of Benzenering connecting to CH₃ (the former, meta whereas the latter, patra), resulting in the differences of magnetic parameters (effect magnetic mo ment, parameter of the magnetic exchange interaction J, relative electron spin concentration ρ and h. f. s. parameters).

The simulation program PROPER-MT for analysis of multiple-pulse and two-dimensional FT NMR experiments using the algebra of product operators is reported. This program can give analytic expressions of operator state at any moment in experiment, so it is generally suitable for the analysis and hopefully helpful for design of the pulse sequences performed on ImSn (I=(1)/2. S=(1)/2; I ≤ m + n ≤ 4) spin systems with weakly scalar coupled spin-spin interactions. Some typical multiple-pulse and 2D FT NMR experiments, particularly; the multiple quantum filtration or/and multiple spin filtration techniques arc simulated with PROPER-MT program. The simulation results are in agreement with that expected.

The ¹⁵N and ¹³C NMR chemical shifts of 12 carboxaldehyde semicarbazones and related compounds have been determined at the natural-abundance. The substituent effects on ¹⁵N and ¹³C chemical shifts were studied and compared with each other. The results show that the ¹⁵N chemical shifts are more sensitive to structural and electronic effects than ¹³C NMR.
The correlation of ¹⁵N chemical shifts for para-substituted N-penyl-carboxaldehyde semicarbazones with Hammett substituent constants (σ) was studied and compared with that of benzenamines.

Free radicals produced in the photolysis of N-Bromosuccinimide (NBS) or hydrogen abstraction reaction between Br. and alcohol or hydrocarbon have been studied by a combination of spin trapping technique and ESR spectrometer. The results show that:
1. Under the UV irradiation a homolytic cleavage of the N-Br bond in NBS occurs.
2. For alcohol and alkanc, the Br abstracted hydrogen on the tertiary carbon and tertiary carbon radical was formed.
3. For substituted benzene, Br abstracted hydrogen on the secondary or tertiary carbon and secondary or tertiary carbon radicals were formed.

The, resonance frequency and Q value of the H₀₂₁ mode cavity with a double separate bulb are calulated in this paper. Because the wall of the bulb is geometrical symmetric, the distribution of the permittivity is symmetric longitudinal. Owing to the existence of the top and bottom of the bulb, the change of the resoname frequency and Q valne is given by means of pertubation method.

Both metal and ligand atoms can be used for NMR study in transition metal compounds. Their spectral features are different from those of the conventional NMR. Examples of ¹H and ⁹⁵Mo NMR are cited discussed.

According to the theory of ABC system, theoretical spectra of ABX system were calculated by varying|J|< 16Hz and the positions and intensities of each specific transitions were analyzed The general rules of the position of each transition in ABX system with various values of coupling constants and their signs were found out Then, a simple procedure was designed by which relative signs of couping constants can be obtained without calculating precisely through intensities of each peak, as follows:
1. To distinguish the four peaks of each A, B, X nuclei in ABX system and to give their marks in order, respectively. (For example, from left to right, a₁~a₄,b₁~b₄,and x₁~x₄, neglecting the mixing transitions.)
2. To get a related diagram discribing the relationship between each peak using double resonance methods.
3. Through inter-exchanging of the marks of the same kind of peaks, finally you can always let a₁, b₁, x₁ to be at the bottom and a₄, b₄, x₄ on the top as a usual diagram of energy level.
4. If you don't need to inter-exchange any marks of peaks, the signs of three coupling constants are the same; if you need to do, then, the sign of coupling constant between relative nuclei due to inter-exchanging must be opposite sign to the other two.

Special ¹H-TRIPLE spectrum of perinaphthenyl radical was measured at 295K.Effect of selection of pump frequencies on the success of such kind of special TRIPLE was investigated.

Marple algorithm is one of the most effective methods for the autoregressive spectrum analysis It yields AR spectra with no apparent line splitting reduced spectral peak frequency estimation biases and higher resolution But the criterion for AR order determination still has not been resolved.
Two ill-conditions and two tolerance factors proposed by Marple for his new recursive algorithm have been discussed from the view of experimental in this paper. The resolution in AR spectra versus AR order has been studied with various noise levels. The problem of spurious spectral peaks was also discussed.

In this paper, the method for the quantitative study of C-glucopyranosides using ¹³C-NMR speotrum through me peak intensity on peak area of sugar carbons was reported. If C-glucopyranosides were readily soluble in the solvent, accurate result can be obtained and relative error will be less than 1%.

Six dimetallic compounds (Et₄N)₂((PhS)₂FeS₂MS_2-nO_n (M=Mo,W; n=0, 1, 2) were studied by ¹H-NMR. These results indicate that the isotropic shift is dominantly from contact interaction. Its magnitudes are correlated closely with Fe→M charge transfer which relies on the type of metal M and ite environment.

An 《HC-4》 CW-NMR spectrometerr for the measurement of the multi-nuclei broad-line in the solid state was designed and manufactured. The scanning and accumulation of the spectra is controlled by the Apple-Ⅱ microcomputer. The home-made cross-coil probe and magic-tec probe together with the high-temperature device is equipped, and then it enables the spectrometer to held excellent sensitivity and wide applicatioa The spectraometer is appropriate to measure non-proton NMR spectra in solid state and dynamic NMR spectra. The whole construction and performance of spectrometer are described in this paper. The sectional specification and some test results aer also given.