2) (a) M. Caplow, J. Am. Chem. Soc., 91, 3639 (1969); (b) E. C. Lucas and M. Caplow, /bid., 94, 960 (1972); (c) A. R. Fersht and Y. Requena. /bid.. 93, 7079 (1971); (d) E. C. Lucas, M. Caplow. and K. J. Bush, ibid., 95, 2670 (1973). (3) M. H. O'Leary and M. D. Kiuetz, J. Am. Chem. SOC., 94, 3565 (1972). (4) A. R. Fersht and Y. Requena, J. Mol. Bioi., 60, 279 (1971). (5) Abbreviatlons used are HCD-Phe-NH2, Kformyl-L-phenylalanine amide; HCO-D-Phe-NH2, Kformyl-o-phenylalanine amide; HCO-Phe-FH, Kformyi-L-phenylalanine formylhydrazide; HCO-D-Phe-FH, Kformyl-D-phenylalanine formylhydrazlde; HCO-MePhe-FH, Kformyl-Kmethyl-L-phenyialanine formylhydrazide; Ac-Tyr-NHPhCl, Kacetyl-L-tyroslne pchloroanilide; Ac-D-Tyr-NHPhCI, Kacetyl-D-tyrosine pchioroaniiide; Ac-MeTyr-NHPhCI, Kacetyl-Kmethyl-L-tyrosine pchloroanilide.(6) K. R. Hanson. R. Llna. and E. Havir. 8iochem. BioDhvs. Res. Commun..

No abstract

Li4TeO 5 is triclinic, space group PL with cell parameters a = 5. 186 (1), b = 7.765 (1), c ---5-120 (1) A, t~ = 101.96 (1), fl = 101.89 (1), ~, = 107.58 (I) ° and Z = 2. The structure was solved by means of Patterson and Fourier syntheses and refined to a final R value of 0.02. This structure is characterized by a dimeric anion Te20~o, made up of two edge-sharing octahedra TeO 6. From this structure, it is apparent that Li4TeO 5 is of the NaCI type, with the Te and Li atoms distributed over the cation positions. The ordered layers are parallel to the (a + b, e) plane. These are composed of two close-packed planes of O atoms between which the Li and Te atoms occupy ] and 2 of the octahedral holes, respectively. Between two such sheets, there are Li atoms in all the octahedral holes.

Die Nucleoside Uridin (II), Cytidin, Adenosin und Guanosin ergeben mit K‐osmat in Pyridin oder mit dem OszOöPy4‐Komplex einen Komplex vom Typ (I) (Kinetik).