Tris complexes Society

Table I. Luminescence Lifetimes for Tris Complexes (Adapted from reference 27. Copyright 2002 American Chemical Society.)...

Uson, R., Laguna, A., Laguna, M., Fernandez, F., Jones, P.G. and Sheldrick, G.M. (1982) Tris(pentafluorophenyl)gold (III) complexes. Journal of the Chemical Society, Dalton Transactions, (10), 1971-1976. 

One example, more extreme than most hopefully, occurred at a meeting of the Material Research Society a year after the initial explosion of interest in superconductivity. During a symposium mention was made of a recently published experiment reporting an increase in Tc by treatment of the solid superconductor with a gas. The chairman asked how many members of the audience had repeated this experiment. Fifty hands were counted out of a total of 450. It is likely that others, not in the audience, had also tried. Almost all of this effort is an unproductive use of the resources alloted to the field. Little appeared in the literature as negative results with such complex solids are rarely definitive and publishable. But remedies are not readily available. 

Fig. 12 Substances used for complex formation and nanoparticles, (retinoic acid) All-trans retinoic acid, (PLA) poly(-L-arginine), (PLH) poly(-L-histidine), (PLL) poly(-L-ly-sine). As dispersing agent a tri-block copolymer was used. It consisted of ethylene oxide and propylene oxide (Poloxamer 188). Reprinted with permission from [142]. Copyright 2000 American Chemical Society...

Fig. 25. Ni(np3)(S02). (Reprinted, with permission, from Synthesis and Structural Characterization of a Sulfur Dioxide Complex of Nickel with Tris-(2-(d henylphosphino)ethyl)amine, Mealli, C. et al. Inorg. Chem. 17, 3021, Fig. 1, copyright, 1978, by the American Chemicd Society)...

Figure 6 The geometry and dimensions of the iron-coordination octahedron in a natural tris(hydroxamate) complex, triacetylfiisari-nine. (Reprinted with permission from Ref. 71. 1980 American Chemical Society)...

Figure 4.9 The structure of complex NaEu(7)3 [lOd]. (Reproduced with permission from T.D. Tilley, R.A. Andersen and A. ZaUdn, Divalent lanthanide chemistry. Preparation and crystal structures of sodium tris[bis(trimethylsilyl)amido]europate(ll) and sodium tris[bis(trimethylsilyl)amido]ytterbate(ll), NaM[N(SiMe3)2]3, Inorganic Chemistry, 23, 2271, 1984. 1984 American Chemical Society.)...

Figure 4.27 (a) Ortep plot of one molecule and (b) stick bond model projection of Ce(OEP)2 [42]. (Reprinted with permission from J.W. Buchler, et ah, Metal complexes with tetrapyrrole ligands. 40. Cerium(IV) bis(octaethylporphyrinate) and dicerium(III) tris(octaethylporphyrinate) parents of a new family of lanthanoid double-decker and triple-decker molecules, Journal of the American Chemical Society, 108, no. 13, 3652-3659, 1986. 1986 American Chemical Society.)... 

Evans, W.J., Gonzales, S.L., and Ziller, J.W. (1991) Synthesis and X-ray crystal structure of the first tris(pentamethylcyclopentadienyl)metal complex (r -CsMeshSm. Journal of the American Chemical Society, 113, 7423. 

Xu, J., Franklin, S.J., Whisenhunt, D.W. Jr, and Raymond, K.N. (1995) Gadolinium complex of tris[(3-hydroxy-l-methyl-2-oxo-l,2-didehydropyridine-4-carboxamido)ethyl]-amine a new class of gadolinium magnetic resonance relaxation agents. Journal of the American Chemical Society, 117, 7245-7246. 

Wemer, E.J., Avedano, S., Botta, M., et al. (2007) Highly soluble tris-hydroxypyridonate Gd(lll) complexes with increased hydration number, fast water exchange, slow electronic relaxation, and high relaxivity. Journal of the American Chemical Society, 129, 1870-1871. 

FIGURE 9-20 The Cotton Effect in ORD and CD, (a) Idealized optical rotatory dispersion (ORD) and circular dichroism (CD) curves at an absorption peak, with a positive Cotton effect, (b) Structures of tris-(S-alaninato) cobalt(IIl) complexes, (c) Absorption and circular dichroism spectra of the compounds in (b). (Data and structures in (b) adapted with permission from R. G. Denning and T. S. Piper, Inorg. Chem., 1966, 5, 1056. 1966 American Chemical Society. Curves in (c) adapted with permission from J. Pujita and Y. Shimura, Optical Rotatory Dispersion and Circular Dichroism, in K. Nakamoto and P. J. McCarthy, eds.. Spectroscopy and Structure of Metal Chelate Compounds, John Wiley Sons Inc., New York, 1968, p. 193. 1968 John Wiley Sons, Inc. Reprinted by permission of John Wiley Sons, Inc.)... 

Fic. 14. Crystal structure (left) of [Mnn(tris(benzimidazoyl-2-methyl)amino)Cl]+, the trigonal bipyramidal complex. Crystal structure (right) of the neutral six-coordinate [Mn"(tris(benzimidazoyl-2-methyl)amine)Cls]. [Reproduced with permission from (211) and (212), respectively. Copyright 1997 the American Chemical Society and copyright 1995 Elsevier Science, respectively.]... 

Fig, 31. Rare examples of Mnn,-OH-complexes [Mnnl(tris(cyclopropylcarbanoyl-methyl)amine)OH] (left) and [Mn "(bis(2-hydroxy-5-nitrobenzoiminopropyl)methyl-amine)OH], [Reproduced with permission from (239) and (242). Copyright 1997 and 1992 the Royal Society of Chemistry, respectively.]... 

Figure 31. A model system developed by Parkin and co-workers (a), Tris(2-mercapto-l-phenylimidazolyl)hydroborato lead complex, [Tm ]Pb [C104] (197), is strikingly similar in structure to the lead bound in the active site of the target protein ALAD (b), (only lead and coordinated cysteines are shown) (245). In both systems, lead is bound in a trigonal pyramidal geometry by three sulfurs. Metal-binding studies on the model system (198) and inhibition studies on the enzyme reveal that lead has a higher affinity for this type of site than the native zinc ion. [Part (a) reprinted with permission from B. M. Bridgewater and G. Parkin, J. Am. Chem. Soc., 122, 7140-7141 (2000). Copyright 1999 American Chemical Society. Coordinates for figure part b) were downloaded from the Protein Databank (pdb file id IQNV).]...

There are other salient facts that do not appear in these lists. Thus, we have not included Hugh Taylor s knighthoods by Queen Elizabeth II and Pope Pius XII and his presidency of the Faraday Society. Nor have we mentioned his great contribution to the Manhattan Project. But it is not our intention within the scope of this paper to list every scientific accomplishment or even every facet of Hugh Taylor s complex personality. After a brief review of his early research, we will try to relay to the reader more personal reminiscences of Sir Hugh. 

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