Synthesis and characterization of metallocyclic complexes of palladium(II) with monoalkyl (alpha-anilino-N-benzyl)phosphonates

The synthesis, spectroscopic and thermal properties of the novel five-membered [N,O] metallocyclic complexes of palladium(II) with monoethyl (HL1) and monobutyl (HL2) esters of (alpha -amino-N-benzyl)phosphonic acid are reported. Binuclear complexes Pd(2)L(4) (L = L1, L2) were obtained by reaction of sodium salts of monoalkyl phosphonates with PdCl(4)(2-) in aqueous solution. Four organophosphorus ligands bridge two palladium atoms by coordination through the aniline nitrogen and the deprotonated phosphonic acid oxygen. The complexes were identified and characterized by elemental analysis, magnetic and conductance measurements, as well as by spectroscopic (ESI-MS, IR, UV-VIS, (1)H and (31)P NMR) and thermal (TG, DTA) studies. The properties of the complexes are discussed with respect to those of palladium(II) metallocyclic complexes reported for monoalkyl 4-azobenzene-substituted anilinobenzylphosphonates

Synthesis and Characterization of Metallocyclic Complexes of Palladium(II) with Monoalkyl (α-Anilino-N-benzyl)phosphonates

The synthesis, spectroscopic and thermal properties of the novel five-membered [N,O] metallocyclic complexes of palladium(II) with monoethyl (HL1) and monobutyl (HL2) esters of (α-anilino-N-benzyl)phosphonic acid are reported. Binuclear complexes Pd2L4 (L = L1, L2) were obtained by reaction of sodium salts of monoalkyl phosphonates with PdCl42- in aqueous solution. Four organophosphorus ligands bridge two palladium atoms by coordination through the aniline nitrogen and the deprotonated phosphonic acid oxygen. The complexes were identified and characterized by elemental analysis, magnetic and conductance measurements, as well as by spectroscopic (ESI-MS, IR, UV-VIS, 1H and 31P NMR) and thermal (TG, DTA) studies. The properties of the complexes are discussed with respect to those of palladium(II) metallocyclic complexes reported for monoalkyl 4-azobenzene-substituted anilinobenzylphos-phonates

Analysis of predicted and observed accumulated convective precipitation in the area with frequent split storms

Convective clouds generate extreme rainfall events and flash floods in small areas with both large spatial and temporal variability. For this reason, the monitoring of the total accumulated precipitation fields at the surface with rain gauges and meteorological radars has both strengths and weakness. Alternatively, a numerical cloud model may be a useful tool to simulate convective precipitation for various analyses and predictions. The main objective of this paper is to show that the cloud-resolving model reproduces well the accumulated convective precipitation obtained from the rain gauge network data in the area with frequent split storms. We perform comparisons between observations and model samples of the areal accumulated convective precipitation for a 15-year period over treated area. Twenty-seven convective events have been selected. Statistical analyses reveal that the model areal accumulated convective precipitation closely match their observed values with a correlation coefficient of 0.80