Proton magnetic resonance spectrum

It has been shown recently that 4-arylidene-2-phenyl-5-oxazol-ones react with diazoalkanes at the exocyclic double bond to give compounds of type 52a. The proton magnetic resonance spectra of these compounds support the cyclopropyl structure. 

Proton magnetic resonance spectra (in CDCI3) of 3-nitro-l,5-naphthyri-dine (84a), 3-nitro-l,6-naphthyridine (84f), and 8-nitro-l,6-naphthyridine (81) have been measured and analyzed [66JCS(B)750]. 

Figure 1. Proton magnetic resonance spectra at 14.1, 23.5, and 51.7 kilo gauss (60, 100 and 220 MHz.) of myo-inositol in deuterium oxide.

Based in part on work aided by a grant (CA-07250) to the University of San Francisco from the National Cancer Institute, U.S. Public Health Service. We are greatly indebted to the scientific staff of Varian Associates, Palo Alto, for the 220 MHz proton magnetic resonance spectra, and... 

The infrared and proton magnetic resonance spectra are identical with those of colorless, doubly distilled material w22 d 1.4706. 

A gas ehromatographic analysis on the produet by the submitter, using an 0.3 x 80 cm. column packed with 10% silicone rubber (SE-30) supported on acid-washed, 60-80 mesh Chromasorb P at 80°, exhibited a single peak. The retention times of di-ter(-butyl malonate, di-fert-butyl diazomalonate, and p-toluenesulfonyl azide were 2, 6, and 9 minutes, respectively. The purity of the product obtained by the checkers was estimated from proton magnetic resonance spectra to be ca. 94%, the remainder being di-tert-butyl malonate. 

Diehl, P., Freeman, R. The Influence of Molecular Shape on Solvent Shifts in the Proton Magnetic Resonance Spectra of Polar Solutes. Mol. Phys. 4, 39 (1961). 

Blears, D. J., Cawley, S., Danyluk, S. S. Proton Magnetic Resonance Spectra of Vinyl-metallic Compounds. Solvent Effects upon the Spectra of a/pfca-chlorovinyl Trichlorosilane and a/pha-chlorovinyl Trimethylsilane. J. Mol. Spectry. 26, 524 (1968). 

Erickson, L. E. Proton Magnetic Resonance Spectra of Substituted Succinic Anhydrides, Acids, Salts and Esters. J. Am. Chem. Soc. 87, 1867 (1965). 

Brouwer and Mackor (1964) found that concentrated and stable solutions of a series of tertiary alkyl cations can be prepared in HF-SbFs and their proton magnetic resonance spectra were recorded. The t-butyl, t-pentyl and t-hexyl cations were observed in this solvent system. The spectra were identical with those obtained previously in SbFs and FSOsH-SbFs solvent systems. 

Theoretical treatment of the spectra of the bipyridines has provided correlations between proton magnetic resonance spectra C-NMR... 

Proton magnetic resonance spectra of the three l,4 3,6-dianhydro-hexitols and their diacetates and dimethanesulfonates were used in... 

The nuclear (proton) magnetic resonance spectra of allylic complexes strongly favor a structure in which all three carbon atoms of the allylic radical are symmetrically bonded to the transition metal M as shown in (XLII). The value of nmr spectroscopy in confirming the presence of a... 

The succinate 1 has the following proton magnetic resonance spectra (chloroform-d) 8 (multiplicity, number of protons, assign-... 

The proton magnetic resonance spectra of the diamagnetic, mixed-ring chelates of rhodium(III) and cobalt(III) revealed an unexpected phenomenon which may have significant implications concerning the question of aromaticity in these compounds. The NMR data in Table I show that each functional group on... 

TABLE VII. Proton Magnetic Resonance Spectra of Mixed-Ring Chelates... 

Figure 14. Proton magnetic resonance spectra of cobalt(lll) complexes showing coupling between adjacent NH and CH protons. (60-mc TPSNa reference extreme right.)...

Figure 15. Proton magnetic resonance spectra of cobalt(III) complexes containing ethylenediamine and/or (— )-propylenediamine (33). (100-mc TMS external reference...

Although in this case the indirect estimate of the intramolecular bonding leads to the correct value, this simple condition does not gener ally prevail (idem, ibid.). It is probable that proton magnetic resonance spectra will provide the best means of assessing intramolecular bond energies—and their practical and theoretical interest is considerable. 

Proton Magnetic Resonance Spectra of Cycl[3,2,2]azines ( -Values, TMS Standard)... 

Figure 1. Proton magnetic resonance spectra of dimyri-stoyl-m -phosphatidylethanolamine at different temperatures, showing onset of mesomorphic phase (9)...

Figure 2. High resolution proton magnetic resonance spectra...

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