نتایج جستجو برای: uranyl complex donor ligands
تعداد نتایج: 929353 فیلتر نتایج به سال:
Background: Couples seeking assisted reproductive donation procedures are faced with complex challenges throughout their treatment which can have important psychological impacts on their life. Selecting a suitable donor is one of the hardest decisions they will ever make. This study was carried out to provide an in-depth description of the experiences of couples in relation to donor selection. ...
A new monoanionic dithiolene ligand is found in Tp*MoO(S(2)BMOQO). A combination of X-ray crystallography, electronic absorption spectroscopy, resonance Raman spectroscopy, and bonding calculations reveal that the monoanionic dithiolene ligand possesses considerable thiolate-thione character resulting from an admixture of an intraligand charge transfer excited state into the ground state wave f...
The complexation of uranyl ions with lipopolysaccharide (LPS), the main component of the cell wall of Gram-negative bacteria, was investigated on a molecular level with U L(III)-edge extended X-ray absorption fine structure (EXAFS) and attenuated total reflection Fourier transform infrared (ATR-FT-IR) spectroscopy over a wide pH range (2.6 to 7.0). For the first time, structural determinations ...
Dedicated to Professor Hubert Schmidbaur, the grand master of gold chemistry, on the occasion of his 75th birthday The chemistry of gold(I) with the ligand binap = 2,2′-bis(diphenylphosphino)-1,1′ -binaphthyl is reported. Reaction of [Au2Cl2(μ-binap)] with silver trifluoroacetate gave the corresponding complex [Au2(O2CCF3)2(μ-binap)], and crystallization in the presence of excess silver trifluo...
Two iron piano-stool complexes containing NHC ligands equipped with hydroxyl-containing pendent arms (aliphatic and aromatic) have been prepared via deprotonation of the imidazolium salts with a strong base. Access to the anionic ligand is afforded with an additional equivalent of base when the wingtip contains a bulky phenol group. X-ray crystallography and DFT calculations demonstrate an appa...
A comparison between the reactivity behavior of two lutetium benzyl complexes supported by different ferrocene-diamide ligands towards aromatic N-heterocycles, such as 1-methylimidazole, isoquinoline, and pyridines, is presented. The two ferrocene-diamide ancillary ligands differ in their nitrogen-donor substituent: adamantyl for one and t-butyldimethylsilyl for the other. The synthesis and cha...
The title bromide salt, [Cr{CO(NH2)2}6](Cr2O7)Br·H2O, is isotypic to the corresponding chloride salt. Within the complex cation, the Cr(III) atom is coordinated by six O atoms of six urea ligands, displaying a slightly distorted octa-hedral coordination environment. The Cr-O bond lengths involving the urea ligands are in the range 1.9534 (13)-1.9776 (12) Å. The Cr2O7 (2-) anion has a nearly sta...
In this study, we examined the effects of simultaneous adsorption of aqueous arsenate and uranyl onto aluminum oxide over a range of pH and concentration conditions. Arsenate was used as a chemical analog for phosphate, and offers advantages for characterization via X-ray absorption spectroscopy. By combining batch experiments, speciation calculations, X-ray absorption spectroscopy, and X-ray d...
There are two crystallographically independent complex mol-ecules with very similar geometries in the unit cell of the title compound, [Mn(C(6)H(4)NO(2))(2)(H(2)O)(2)]·0.5C(3)H(7)NO. The central ion is situated in a distorted octa-hedral environment of two N- and four O-donor atoms from two pyridine-2-carboxyl-ate ligands and two cis-disposed water mol-ecules. The carboxyl-ate ligands are coord...
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