Zobrazeno 1 - 10
of 1 715
pro vyhledávání: '"R, Fronczek"'
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 80, Iss 10, Pp 1097-1100 (2024)
The title hydrated molecular salt, C19H15N4+·Cl−·2.5H2O, has two triphenyltetrazolium cations, two chloride anions and five water molecules in the asymmetric unit. The cations differ in the conformations of the phenyl rings with respect to the he
Externí odkaz:
https://doaj.org/article/8092860e6f63483490dd4cc29d67f3d5
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 80, Iss 7, Pp 742-745 (2024)
The title compound, [Re(C17H22N3O2S)(CO)3] is a net neutral fac-Re(I)(CO)3 complex of the 4-methylbiphenyl sulfonamide derivatized diethylenetriamine ligand. The NNN-donor monoanionic ligand coordinates with the Re core in tridentate fashion, establi
Externí odkaz:
https://doaj.org/article/c827d0a4b2c443859816bac9a569183d
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 80, Iss 7, Pp 725-728 (2024)
The oxidation of methionyl peptides can contribute to increased biological (oxidative) stress and development of various inflammatory diseases. The conformation of peptides has an important role in the mechanism of oxidation and the intermediates for
Externí odkaz:
https://doaj.org/article/0f0b408692ea4bb5a205bfed726093c2
Publikováno v:
IUCrData, Vol 9, Iss 11, p x241126 (2024)
The title compound, C5H2Cl3NO, is almost planar. In the crystal, the molecules form centrosymmetric hydrogen-bonded dimers through pairwise O—H...N interactions to generate R22(8) loops.
Externí odkaz:
https://doaj.org/article/0722ba13c3ce4d8596825ba1967732db
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 80, Iss 1, Pp 58-61 (2024)
At room temperature, the title salt, C7H10NO+·Cl−, is orthorhombic, space group Pbca with Z′ = 1, as previously reported [Zhao (2009). Acta Cryst. E65, o2378]. Between 250 and 200 K, there is a solid-state phase transition to a twinned monoclini
Externí odkaz:
https://doaj.org/article/9e3e00e0589d4887b65e6b39a45cb4be
Publikováno v:
IUCrData, Vol 9, Iss 1, p x231076 (2024)
The structure of the title compound, C9H10OTe, at 100 K has orthorhombic (P21212) symmetry with two independent molecules in the asymmetric unit (Z′ = 2). The molecules are folded along their Te...O axes, with their Te–C–O planes angled at an a
Externí odkaz:
https://doaj.org/article/e4386ca337b94c53a6d69a1df24c06c6
Autor:
Uttam R. Pokharel, Brennan J. Curole, Autumn M. Andras, Brandon P. LeBlanc, Frank R. Fronczek
Publikováno v:
Crystals, Vol 14, Iss 6, p 548 (2024)
The effects of the ferrocenyl moiety to enhance the nucleophilicity of the carbonyl group, situated at its adjacent position, have been explored in a series of α-ferrocenyl ketocarboxylic acids. In the presence of trifluoroacetic anhydride, 3-ferroc
Externí odkaz:
https://doaj.org/article/122268ff45524e9cbadaf10a7c2eb659
Publikováno v:
IUCrData, Vol 8, Iss 7, p x230565 (2023)
The title compound, C12H15NO3, crystallizes with Z′ = 2 in space group Pca21 with the two independent molecules having almost the same conformation, differing mostly at the end of the butanamide chain. A local inversion center near 1/8, 3/4, z rela
Externí odkaz:
https://doaj.org/article/876a226ad66240cb868d77ae84a5cbc5
Autor:
Uttam R. Pokharel, Derek P. Daigle, Stone D. Naquin, Gwyneth S. Engeron, Mary A. Lo, Frank R. Fronczek
Publikováno v:
Crystals, Vol 14, Iss 2, p 141 (2024)
Two ferrocene derivatives, namely, 1,2-(tetramethylene)-ferrocene and 1,2,1′,2′-bis(tetramethylene)-ferrocene, were synthesized in a four-step reaction sequence starting from ferrocene. Friedel–Crafts acylation of ferrocene using succinic anhyd
Externí odkaz:
https://doaj.org/article/75511f039f5a4290a5b621106e8539db
Publikováno v:
IUCrData, Vol 8, Iss 6, p x230551 (2023)
The study of the oxidation of various proteins necessitates scrutiny of the amino acid sequence. Since methionine (Met) and tyrosine (Tyr) are easily oxidized, peptides that contain these amino acids are frequently studied using a variety of oxidatio
Externí odkaz:
https://doaj.org/article/b932f93d779f41fa8dbd80f4c6a6e20f