Zobrazeno 1 - 10
of 229
pro vyhledávání: '"Gustavo Portalone"'
Autor:
Goulielmina Anyfanti, Antonio Bauzá, Lorenzo Gentiluomo, João Rodrigues, Gustavo Portalone, Antonio Frontera, Kari Rissanen, Rakesh Puttreddy
Publikováno v:
Frontiers in Chemistry, Vol 9 (2021)
Hexamethylenetetramine (HMTA) and N-haloimides form two types of short (imide)X···N and X–X···N (X = Br, I) halogen bonds. Nucleophilic substitution or ligand-exchange reaction on the peripheral X of X–X···N with the chloride of N-chloro
Externí odkaz:
https://doaj.org/article/70329af5755c4c959490e2e1128997cd
Autor:
Gustavo Portalone
Publikováno v:
IUCrData, Vol 4, Iss 6, p x190861 (2019)
6-Methyluracil, C5H6N2O2, exists in two crystalline phases: form (I), monoclinic, space group P21/c [Reck et al. (1988). Acta Cryst. A44, 417–421] and form (II), monoclinic, space group C2/c [Leonidov et al. (1993). Russ. J. Phys. Chem. 67, 2220–
Externí odkaz:
https://doaj.org/article/a79936dff1fd4eb7ba21bad5fd6687e6
Publikováno v:
Molecules, Vol 26, Iss 11, p 3111 (2021)
Although natural or artificial modified pyrimidine nucleobases represent important molecules with valuable properties as constituents of DNA and RNA, no systematic analyses of the structural aspects of bromo derivatives of cytosine have appeared so f
Externí odkaz:
https://doaj.org/article/759dbd5419be4de7b28efa25c0e0c89d
Autor:
Gustavo Portalone
Publikováno v:
Crystals, Vol 10, Iss 11, p 999 (2020)
To date, despite the crucial role played by cytosine, uracil, and thymine in the DNA/RNA replication process, no examples showing isomorphic and isostructural behavior among binary co-crystals of natural or modified pyrimidine nucleobases have been s
Externí odkaz:
https://doaj.org/article/bec701c0e665489aba2e49a0079273b2
Autor:
Gustavo Portalone
Publikováno v:
Crystals, Vol 9, Iss 9, p 467 (2019)
Seven 5-and 6-halogenated derivatives of uracil or 1-methyluracil (halogen = Cl, Br, I) were studied by single crystal X-ray diffraction. In contrast with pure 5-halouracils, where the presence of N-H⋯O and C-H⋯O hydrogen bonds prevents the forma
Externí odkaz:
https://doaj.org/article/6a6c49c7e1e04aaeaa08b2be7231a5d8
Autor:
Gustavo Portalone
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 7, Pp o1114-o1115 (2013)
The title molecular salt, C7H9N2+.C8H7O3−, was synthesized by reaction between benzamidine (benzenecarboximidamide) and 2-methoxybenzoic acid. In the cation, the amidinium group has two similar C—N bonds [1.3070 (17) and 1.3145 (16) Å] and is al
Externí odkaz:
https://doaj.org/article/e2ab662aa362477d8b9869ec2828c659
Autor:
Gustavo Portalone, Simona Irrera
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 1, Pp o56-o56 (2013)
The title salt, C8H11N2O+·Br−, was synthesized by the reaction between 4-methoxybenzamidine (4-amidinoanisole) and hydrobromic acid. In the cation, the amidinium group has two similar C—N bonds [1.304 (2) and 1.316 (2) Å], and its plane forms a
Externí odkaz:
https://doaj.org/article/39d4f31c905e48a4ab9a1c8e476ed039
Autor:
Gustavo Portalone
Publikováno v:
Acta Crystallographica Section E, Vol 69, Iss 1, Pp o14-o15 (2013)
The title compound, C4H6N3O+·C5H3N2O4−·2H2O or Cyt+·Or−·2H2O, was synthesized by a reaction between cytosine (4-amino-2-hydroxypyrimidine, Cyt) and orotic acid (2,4-dihydroxy-6-carboxypyrimidine, Or) in aqueous solution. The two ions are join
Externí odkaz:
https://doaj.org/article/4c16bd851a854c20af1bb4c291bc4795
Autor:
Simona Irrera, Gustavo Portalone
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 12, Pp o3350-o3351 (2012)
The title hydrated salt, C8H11N2O+·C2HO4−·H2O, was synthesized by a reaction of 4-methoxybenzamidine (4-amidinoanisole) and oxalic acid in water solution. In the cation, the amidinium group forms a dihedral angle of 15.60 (6)° with the mean plan
Externí odkaz:
https://doaj.org/article/45de7cc47da04218b9208066fb3723cb
Autor:
Simona Irrera, Gustavo Portalone
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 12, Pp o3334-o3334 (2012)
The title salt, C8H11N2O+·NO3−, was synthesized by a reaction between 4-methoxybenzamidine (4-amidinoanisole) and nitric acid. The asymmetric unit comprises a non-planar 4-methoxybenzamidinium cation and a nitrate anion. In the cation, the amidini
Externí odkaz:
https://doaj.org/article/7b8e392176f4407a8976b8822df99f9a