Organotin(IV)n+ complexes formed with biologically active ligands: equilibrium and structural studies, and some biological aspects

This review describes the structural chemistry of organotin carboxylates, covering data acquired for mono-, di- and tri-organotin compounds and complexes. A brief discussion is given for organotin amino-acid derivatives.

Structural chemistry of organotin carboxylates: a review of the crystallographic literature

The shielding of γ-rays by concrete has been investigated for concretes containing different amounts of barite and normal weight aggregates. The linear attenuation coefficients ( μ , cm −1 ) have been calculated at photon energies of 1 keV to 100 GeV using XCOM and the obtained results compared with the measurements at the photon energies of 0.66 MeV and 1.33 MeV. It is shown that the type of the aggregate is more important than the amount of aggregate used in concrete for γ-ray shielding.

Radiation shielding of concretes containing different aggregates

Organotin(IV) complexes of amino acids and peptides

Publisher Summary This chapter reviews that the impact of 119Sn nuclear magnetic resonance (NMR) parameters, determined either by 119Sn NMR or in the NMR spectra of other nuclei, on tin chemistry is remarkable. Nowadays, tin chemical shifts coupling constants and nuclear spin relaxation, with respect to the physical principles, is growing. At the same time, the application of more or less sophisticated NMR techniques enables one to monitor the reactions, identify the unstable intermediates, discover their relevance for mechanistic implications, assign the structural features, investigate the intra- and intermolecular dynamic processes, or to compare the structures in the solid and liquid state. 119Sn NMR parameters, in addition to those of the more common nuclei, for example, 1H, 13C, or 31P, add to the attempts at a more complete description of the bonding situation. The chapter suggests that it must be emphasized that the great potential of modern NMR spectrometers can be exploited by a multinuclear approach to obtain a large self-consistent set of NMR data. This also includes the isotope induced chemical shifts and long-range coupling constants that have been neglected in the past.

Application of 119Sn NMR Parameters

Preparation and the Infrared, Moessbauer, and 1H-, 13C-, and 119Sn-NMR Spectra of Some Triorganotin(IV) Derivatives of N-Benzoyl-D,L-alanine and N-Benzoyl-D,L-alanylglycine.

G.K. Sandhu

Papers

Preparation and the Infrared, Moessbauer, and 1H-, 13C-, and 119Sn-NMR Spectra of Some Triorganotin(IV) Derivatives of N-Benzoyl-D,L-alanine and N-Benzoyl-D,L-alanylglycine.