Spectral studies on metal-ligand bonding of novel rhodanine azodye sulphadrugs.

A series of novel complexes with 5-sulphadiazineazo-3-phenyl-2-thioxo-4-thiazolidinone (H2L1) and 5-sulphamethazineazo-3-phenyl-2-thioxo-4-thiazolidinone (H2L2) and various anions were prepared. Their structures and properties were characterized by elemental analyses, IR, UV-vis, EPR spectroscopy and magnetic measurements. The visible and EPR spectral studies indicated that the Cu(II) complexes have distorted octahedral. From the electron paramagnetic resonance and spectral data, the orbital reduction factors k(parallel) and k(perpendicular) were calculated. In all cases k(perpendicular) > k(parallel) indicates a 2B1g ground state. The crystal field parameters for Co(II) and Ni(II) complexes were calculated. The electronic absorption and a g(parallel)/A(parallel) values are indicative for the beginning of tetragonal distortion. The complexes, however, have lower symmetries and the amount of distortion in terms of DT/Dp, applying NSH 'Hamiltonian Theory' has been evaluated which indicate that the complexes are moderately distorted.

[Peri-bulbar anesthesia for cataract surgery]. / Anesthésie péribulbaire pour chirurgie de la cataracte.

Ninety-five peribulbar blocks for cataract extraction with intraocular lens implantation were performed by an anaesthetist over a period of 6 months. The quality of the block was assessed by the ophthalmologist and the anaesthetist. No dangerous local or systemic complications were observed. Peribulbar anaesthesia is increasingly preferred to retrobulbar block on account of its easiness and safety.