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Insights into the Catalytic Mechanism of Tyrosine Phenol-lyase from X-ray Structures of Quinonoid Intermediates*
The mechanism by which binding of the substrate and restructuring of the active site during its closure protect the quinonoid intermediate from the solvent and bring catalytically important residues into positions suitable for the abstraction of phenol during the β-elimination of l-tyrosine is uncovered.
Synthesis of five new molybdenum(VI) thiosemicarbazonato complexes. Crystal structures of salicylaldehyde and 3-methoxy-salicylaldehyde 4-methylthiosemicarbazones and their molybdenum(VI) complexes
Abstract Polynuclear [MoO2{SalTSC-4-Me}]n (I), [MoO2{VanTSC-4-Me}]n (II) and mononuclear [MoO2{SalTSC-4-Me}(CH3OH)] (1a), [MoO2{VanTSC-4-Me}(CH3OH)] (2a) and [MoO2{VanTSC-4-Me}(H2O)] · CH3CN (2b)
Mercury(II) Compounds with 1,3-Benzothiazole-2-thione. Spectral, Thermal, and Crystal Structure Studies
Mercury(II) halides, HgX2 (X = Cl−, Br−, I−) react with 1,3-benzothiazole-2-thione (btztH) in methanol solutions giving the HgX2(btztH) and HgX2(btztH)2 types of compounds. Mercury(II) acetate gives
1,3-Benzothiazole-6-carboxamidinium chloride dihydrate.
The title compound, C( 8)H(8)N(3)S(+).Cl(-).2H(2)O, has been synthesized and characterized both spectroscopically and structurally, all interconnected by hydrogen bonds into a three-dimensional network.
Crystal structure of bovine 3‐hydroxyanthranilate 3,4‐dioxygenase
3‐Hydroxyanthranilate 3,4‐dioxygenase, the enzyme that catalyzes the conversion of 3‐hydroxyanthranilate to quinolinic acid, has been extracted and purified from bovine kidney, crystallized and its
Novel 9a,11-bridged azalides: One-pot synthesis of N'-substituted 2-imino-1,3-oxazolidines condensed to an azalide aglycone.
An efficient one-pot method for the synthesis of novel 9a,11-bridged 15-membered 9a-aza-9-deoxo-9a-homoerythromycin A and its 6-O-methyl analogue has been developed and a mechanism for the formation of N'-substituted-2-imino-1,3-oxazolidines is discussed.
Structure and Spectroscopic Characteristics of N,N′-bis(2-Hydroxy-3-methoxyphenylmethylidene)2,6-pyridinediamine
The Schiff base N,N′-bis(2-hydroxy-3-methoxyphenylmethylidene)-2,6-pyridinediamine has been synthesized and characterized in the solid state and in solution using X-ray analysis, IR, UV/Vis, and NMR
Preparation, Thermal Analysis and Spectral Characterization of the 1:1 Complexes of Mercury(II) Halides and Pseudohalides with 3,4,5,6-Tetrahydropyrimidine-2-thione. Crystal Structures of
Mercury(II) complexes of the type HgX_2(H_4pymtH) (X = Cl, Br, I, SCN, CN ; H_4pymtH = 3, 4, 5, 6-tetrahydropyrimidine-2-thione) have been obtained and structurally characterized by X-ray
The title compound, [HgBr(C7H4NO4)(H2O)], was obtained by the reaction of an aqueous solution of mercury(II) bromide and pyridine-2,6-dicarboxylic acid (picolinic acid, dipicH(2)). The shortest bond
Binding of Mercury(II) by N -(2-mercaptopropionyl)glycine. Synthesis, IR and NMR Characterization. Crystal Structure of the 1:2 Solvate of Bis[ N -(propionyl-2-thiolato)-glycine]mercury(II) with
Bis[N-(propionyl-2-thiolato)glycine]mercury(II), Hg[SCH(CH3)CO-NHCH2COOH](2), was obtained by the reaction of an aqueous solution of N-(2-mercaptopropionyl)glycine and mercury(II) acetate. From the