Department of Chemistry and Biochemistry, University of Sussex, Brighton, UK BN1 9QJ.
Published: July 2010
AI Article Synopsis
Article Abstract
The new [Al(L(Tol))Br(2)] (1) and the known [Al(L(Ph))Me(2)] (2) were prepared as potential precursors to more novel aluminium compounds. In the event, only the latter was effective. Thus 2 and two equivalents of potassium was the source of [{Al(L(Ph))Me(2)K(2)(OEt(2))}(2)] (3). The complexes [{KSm(L(Ph))(2)}(2)] (4), [Sm(2)(L(Dph))(3)] (5) and [Sm(L(Tol,Ad))(L(Tol,Ad)-H)] (6) were obtained from SmI(2) and two equivalents of the appropriate potassium beta-diketiminate [L(Ph) or L(Tol) or L(Dph) = {N(SiMe(3))C(Ar)}(2)CH, Ar = Ph or C(6)H(4)Me-4 or C(6)H(4)Ph-4; L(Tol,Ad) = N(SiMe(3))C(C(6)H(4)Me-4)C(H)C(Ad)NSiMe(3), L(Tol,Ad)-H = N(SiMe(3))C(C(6)H(4)Me-4)C(H)C(Ad)NSiMe(2)CH(2), Ad = 1-adamantyl]. Crystalline complexes 3-6 were isolated in very low (4, 5) or satisfactory (3, 6) yield and characterised by X-ray diffraction. From comparisons of the M-N, N-C, C-C and C-C(Ar) bond lengths with suitable standards, complexes 3-5 are assigned as containing Al(3+)/(L(Ph))(3-) for 3, Sm(3+)/(L(Ph))(-)/(L(Ph))(3-) for 4, and {Sm(3+)}(2)/(L(Dph))(-)/(L(Dph))(2-)/(L(Dph))(3-) for 5. Complex 6 is best formulated as a Sm(3+) compound with one "normal" (L(Tol,Ad))(-) and one deprotonated (L(Tol,Ad)-H)(2-) ligand.
The isolation and crystalline structure of ,'-di-benzyl-ethyl-enedi-ammonium dichloride, CHN ·2Cl, is reported. This was obtained as an unintended product of an attempted Curtius rearrangement that involved benzyl-amine as one of the reagents and 1,2-di-chloro-ethane as the solvent. Part of a series of reactions of a course-based undergraduate research experience (CURE), this was not the intended reaction outcome.
Lopinavir is a potent protease inhibitor that is used as a first-line pharmaceutical drug for the treatment of HIV. The multi-component solvated Lopinavir crystal, systematic name (2)--[(2,4,5)-5-[2-(2,6-di-methyl-phen-oxy)acetamido]-4-hy-droxy-1,6-di-phenyl-hexan-2-yl]-3-methyl-2-(2-oxo-1,3-diazinan-1-yl)butanamide-ethane-1,2-diol-water (8/3/7) 8CHNO·3CHO·7HO, was prepared using evaporative methods. The crystalline material obtained from this experimental synthesis was characterized and elucidated by single-crystal X-ray diffraction (SC-XRD).
Objective: The aim of this study is to compare the results of preoperative biometric data measured with optical biometers of different generations in patients with cataract. Lenstar optical biometry is based on the principle of optical low-coherence reflectometry (OLCR), and Anterion on swept-source optical coherence tomography (SS-OCT).
Material And Methods: A total of 200 eyes (103 patients) were included in a prospective study at the Faculty Hospital in Trenčín the period from June 2023 to January 2024.
Background: To investigate the spatial and morphologic features of lenses with different axial length (ALs) in cataract patients using swept-source optical coherence tomography (SS-OCT).
Methods: Totally 105 eyes of 105 patients scheduled to have cataract surgery were included. Eyes were divided into the control (AL < 24.
Metal-organic frameworks (MOFs) with adjustable structures, diverse chemical functionalities, and excellent CO capture ability have shown important potential application in the photocatalytic reduction of CO to valuable fuel to curb the energy crisis. In this work, a series of new isostructural lanthanide-organic frameworks based on hexanuclear {LnO} clusters, {(DMA) [Ln(μ-OH)(HO)(SBTC)]} (Ln-MOFs, Ln = Eu, Dy, Gd, Tb, Yb; HSBTC = 5,5'-(ethene-1,2-diyl) di-isophthalic acid; DMA = dimethylamine cation) were synthesized by the solvothermal method. Ln-MOFs were metal-organic frameworks formed by {Ln(μ-OH)} clusters and poly(carboxylic acid) ligands HSBTC, which exhibited excellent photocatalytic properties for the reduction of CO to CO.
