Schwermetallchelate von α-Cyano-β-amino-dithioacrylsäureestern

Heavy Metal Chelates of α-Cyano-β-amino-dithioacrylates The inner metal chelates of Pd^II, Ni^II, Co^III, and Ag^I with α-cyano-β-amino-dithioacrylates have been prepared. The coordination of the dithioester group and the amine nitrogen (S/N-coordination) has been proved by the chemical shift of the S2p and N1s electron binding energies in the ESCA spectra.     

Test of time-reversal symmetry in the proton-deuteron system

Internal target experiments with high-quality proton beams allow for a new class of experiments providing null tests of time-reversal symmetry in forward scattering. This could yield more stringent limits on T-odd P-even observables. An excellent candidate for such experiments is the proton-deuteron system. This system is analyzed in terms of effective T-violating P-conserving nucleon-nucleon interactions and bounds on coupling strengths that might be expected are given.     

An easy applicable method for the design of asymmetrical finline and slotline tapers

In this paper, some utilities for the developement of asymmetrical circular arc tapes are described. Basing on a polygon-approximation of characteristic impedance a method for to determine the geometrical parameters of the taper is explained. The applicability of the method presented here is proved by extensive measurements.     

The excited states of 85Sr

High resolution γ-ray studies have shown the decay patterns of isomers of ⁸⁵Y to be very complex. A level scheme of ⁸⁵Sr is proposed from the results of γ-γ coincidence measurements. Spin and parity assignments to the levels of ⁸⁵Sr were made on the basis of log ft values, nuclear reaction data and γ-ray branchings. The level scheme is discussed within the theoretical framework of $\text{n(}\text{g}{}_{\mathrm{<mtext>9</mtext><mtext>2</mtext>}}\text{)}{}^{\mathrm{?3}}$ cluster properties.     

Zur Komplexbildung von N-(Thiocarbamoyl)benzamidinen

Complex Formation of N-(Thiocarbamoyl) benzamidines N-(Thiocarbamoyl)benzamidines 1 and N-(Thiocarbamoyl)-N′-phenyl-benzamidines 2 form in alcoholic solutions with Ni²⁺, Cu²⁺, Pd²⁺, Co³⁺, and Ag⁺ ions well crystallized chelates 1a ? h and 2a? h , respectively, with N/S coordination. The X-ray photoelectron spectra evidence the NH group as ligator in the case of chelates of 1 and the increased donor capacity compared with the isosteric oxygen ligator atom bound to nickel. This is confirmed by d-¹H-n.m.r. spectroscopy analyzing the value of ΔG_c^≠ for the rotational barrier for the Et₂N group of 1a     

Ergodic computations with continued fractions and Jacobi's algorithm

Ergodic computational aspects of the Jacobi algorithm, a generalization to two dimensions of the continued fraction algorithm, are considered. By means of such computations the entropy of the algorithm is estimated to be 3.5. An approximation to the invariant measure of the transformation associated with the algorithm is obtained. The computations are tested by application to the continued fraction algorithm for which both entropy and the invariant measure are known.Work partly performed under the auspices of the U.S. Atomic Energy Commission while one of the authors (M.S.W.) was a faculty participant of the Associated Western Universities at Los Alamos Scientific Laboratory. The work was also supported in part by NSF grant GP-28313 to M. S. W.