Nuclear magnetic resonance studies complexes

Halpin RA, GD Hegeman, GL Kenyon (1981) Carbon-13 nuclear magnetic resonance studies of mandelate metabolism in whole bacterial cells and in isolated, in vivo cross-linked enzyme complexes. Biochemistry 20 1525-1533. 

Connick, R. E. Poulsen, R. E. (1957). Nuclear magnetic resonance studies of aluminium fluoride complexes. Journal of the American Chemical Society, 79, 5153-7. 

B. Akermark, B. Krakenberger, S. Hansson, Ligand Effects and Nucleophilic Addition to (T)3-Allyl)palladium Complexes. A Carbon-13 Nuclear Magnetic Resonance Study, Organometallics, 1987, 6, 620-628. 

A solution-state and solid-state nuclear magnetic resonance study of the complex and its separate components in both their neutral and ionized (TMP hydrochloride and SMZ sodium salt) forms was undertaken in order to elucidate the TMP-SMZ interactions. Inspection of the data for the complex in the solid state shows that the 13C chemical shifts are consistent with the ionic structure proposed by Nakai and coworkers105 (14). Stabilization of the complex is achieved by the resulting ionic interaction and by the formation of two intermolecular hydrogen bonds. 

The above type of bonding is assumed to occur in other metal-olefin and metal-acetylene complexes (172). Acetylenes have two mutually perpendicular sets of ir-orbitals and are therefore capable of being bonded to one or to two metal atoms both types of complexes are known. When the hydrocarbon is a nonconjugated polyolefin e.g., cyclo-octa-1,5-diene, each C C bond interacts independently with the metal atom. In complexes of conjugated polyolefins, e.g., cyclopentadiene, infrared and nuclear magnetic resonance studies (99) indicate that it is not yet possible to distinguish between structure (IV), in which each C C bond independently contributes two --electrons to the metal-olefin bonding, and structure (V), in which... 

Griffith and Wilkinson, in a nuclear magnetic resonance study (3), found that a hydrido complex was formed in quantitative yield on treatment of cyano-cobaltate(II) solution with sodium borohydride. A hydrido complex was also present to the extent of 3% in a solution which had not been so treated. Furthermore, saturation of the solution with hydrogen, or aging, did not increase the amount of hydrido species, and it was suggested that these latter processes involved the formation of a nonhydridic cobalt(I) species. 

Hatakeyama, K. Park, Y.-Y. Tomiyasu, H. Wada, Y. Ikeda, Y. A nuclear magnetic resonance study on ligand exchange reactions in U(VI) nitrato complexes with ligands containing phosphoryl group in non-aqueous solvents, J. Nucl. Sci. Technol. Tokyo 34 (1997) 298-303. 

Hackbusch, W., Rupp, H.H. and Weighardt, K. (1975) Cobalt-59 nuclear magnetic resonance study of some polynuclear cobalt(III) complexes. /. Chem. Soc. Dalton, 1015-1018. 

Merlic, CA. and Adams, B. (1992) Molybdenum-95 nuclear magnetic resonance studies on molybdenum carbonyl complexes of isonitriles and amines./. Organomet. Chem., 431, 313-325. 

Read, M.C., Glaser, J. and Sandstrom, M. (1992a) A 103Rh nuclear magnetic resonance study of rhodium(III) bromide complexes in aqueous solution./. Chem. Soc. Dalton, 233-240. 

Yajima, F., Koike, Y., Yamasaki, A. and Fujiwara, S. (1974) Cobalt-59 nuclear magnetic resonance study of cobalt(III) complexes. Empirical rules for the cobalt-59 chemical shifts and line widths of [Com(en)x(NH3) 6 2x—yLy]-type complexes. Bull. Chem. Soc.Jpn, 47, 1442-1446. 

Delfini, M., E. Gaggelli, A. Lepri, and G. Valensin. 1985. Nuclear magnetic resonance study of the oxovanadium-(glutathione)2 complex. Inorg. Chim. Acta 107 87-89. 

Nuclear Magnetic Resonance Studies on Streptomyces Subtilisin Inhibitor and its Complexes with Proteinases... 

A.C. Larsson, A nuclear magnetic resonance study of dialkyldithiophosphate complexes, PhD thesis, Lulea University of Technology, Department of Chemical Engineering and Geosciences, Division of Chemistry, Porson, Lulea, Sweden, 2004. 

Dr. Summers research in the area of nuclear magnetic resonance studies of complex biosystems is at the forefront of biomedical research. Each summer approximately 20 undergraduates work in his laboratory. They are given the same responsibilities as graduate students, completing their own projects... 

Martin, F., Rubini, P., Cote, R. Kottke, I. (1994). Aluminium polyphosphate complexes in the mycorrhizal basidiomycete Laccaria bicolor. A Al-nuclear magnetic resonance study. Planta, 194, 241-6. 

Le-Thanh, H. and Vocelle, D., Nuclear magnetic resonance study of complexes formed between conjugated Schijf bases and carboxylic acids. Can. J. Chem. 72, 2220-2224 (1994). 

One last example, the racemization of a tris (bidentate) ion by an intramolecular mechanism in which one end is temporarily uncoordinated is shown in Figure 6, where A = G. The bond rupture mechanism is considered the probable mechanism for racemization of unsymmetrical /3-diketone complexes based on the nuclear magnetic resonance studies by Fay and Piper 39). Extension of the scheme shown in Figures 1 and 2 to other systems is almost limitless. 

Dimethyl sulfoxide solutions of [(CgHe)RuCl2]2 were shown to react with nucleophiles such as H , OH , or CN . Nuclear magnetic resonance studies showed the presence of cyclohexadienyl complexes, but the compounds were too unstable to be isolated, and the identity of the other ligands coordinated to the ruthenium atom is uncertain (462, 464). 

Dynamic nuclear magnetic resonance studies were carried out on mononuclear complexes of type... 

Nuclear magnetic resonance study of molecular complexes of 7,7,8,8-tetracyanoqui-nodimethane and aromatic donors, M. W. Hanna and A. L. Ashbaugh, J. Phys. Chem., 1964, 68, 811. 

S Libich, DL Rabenstein. Nuclear magnetic resonance studies of the solution chemistry of metal complexes determination of formation constants of meth-ylmercury complexes of selected carboxylic acids. Anal Chem 45 118-124, 1973. 

KH Chung, C-H Moon. Cadmium-113 nuclear magnetic resonance studies of cadmium(II)-carboxylate complexes in aqueous solution. J Chem Soc Dalton Trans 75—78, 1996. 

Evidence for this complex formation between DBTDL and DABCO catalyst was obtained from nuclear magnetic resonance studies. 

Tetrakis(organophosphorus)metal hydrides (containing one, two, three, or four hydride nuclei) have recently attracted considerable attention in connection with their stereochemical behavior1 and reaction chemistry.2 Detailed nuclear magnetic resonance studies and line-shape analyses have substantiated stereochemical nonrigidity in many of these complexes in solution and have yielded mechanistic information about the intramolecular-exchange processes.3... 

H1 nuclear magnetic resonance studies show that the compounds known as aluminum alkyl sesquichlorides (85) occur at room temperature as association complexes of RAICI2 and R2A1C1 (R = CH3, C2H5) with A1C12A1 bridging (34). It has, of course, not yet been possible to identify or even to separate the conceivable cis and trans forms of the RA1C12 dimers ... 

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