Publicaciones 2011-2020

@article{RN152,
title = {Raman Spectroscopy and X-Ray Fluorescence in Molecular Analysis of Yellow Blocks from the Archeological Site Playa Miller 7 (Northern Chile)},
author = { M. Sepulveda and S. Gutierrez and M. Campos-Vallette and E. Clavijo and P. Walter and J.J. Carcamo},
url = {/brokenurl#<Go to ISI>://WOS:000331238200008},
doi = {10.4067/S0717-97072013000300008},
issn = {0717-9707},
year = {2013},
date = {2013-01-01},
journal = {Journal of the Chilean Chemical Society},
volume = {58},
number = {3},
pages = {1836-1839},
abstract = {Yellow blocks from the archaeological site Playa Miller 7 (PLM7), on the coast of Atacama Desert in northern Chile, were analyzed by Raman spectroscopy and X-ray fluorescence (XRF) portable. Our results identify for the first time the use of K-jarosite and natrojarosite in prehispanic times (approx. 2500 year BP). In search of a possible source of supply for this mineral hydrothermal origin, our surveys were focused on Andean geothermal areas with identification, so far, from a single source in the region of Arica and Parinacota: Jurasi (JU), located at 4000 mamsl. Comparison of the Raman spectra between samples archaeological and Jurasi, allow us to infer that this hydrothermal source could be used as obtaining source of yellow pigment by prehispanic inhabitant of Formative period (3700-1500 years B.P.).},
keywords = {art, chile, diagnosis, fluorescence, identification, jarosite, micro-raman, northern pigments, raman spectra spectroscopy, x-ray},
pubstate = {published},
tppubtype = {article}
}

@article{RN26b,
title = {Hydrogen-Bonded Supramolecular Array in the Crystal Structure of Ethyl 7-Hydroxy-2-Oxo-2h-Chromene-3-Carboxylate Monohydrate},
author = {A. Gald\'{a}mez and O. Garcia-Beltran and B.K. Cassels},
url = {/brokenurl#<Go to ISI>://WOS:000290700500005},
doi = {10.4067/S0717-97072011000100005},
issn = {0717-9324},
year = {2011},
date = {2011-01-01},
journal = {Journal of the Chilean Chemical Society},
volume = {56},
number = {1},
pages = {546-548},
abstract = {The crystal structure of ethyl 7-hydroxy-2-oxo-2H-chromene-3-carboxylate monohydrate (1), C(12)H(10)O(5).H(2)O, was established by X-ray crystallographic analysis. The molecule of the title compound is essentially planar except for the carboxylate substituent group. The crystal packing supramolecular array arises from hydrogen bonds and intermolecular C-H center dot center dot center dot O=C contacts of the organic molecules and solvent water molecules, with graph-Set descriptor R(4)(2)(8), R(1)(2) (6), R(4)(4)(20) and C(5) motifs. The water molecules are involved as donors and acceptors. The hydrogen bond and intermolecular interaction network is reinforced by stacking of the sheet through pi-pi interactions.},
keywords = {coumarins, crystal design diffraction, patterns, structure, x-ray},
pubstate = {published},
tppubtype = {article}
}

@article{RN14g,
title = {Crystal Structure of (1r,5s)-9-Nitro-1,2,3,4,5,6-Hexahydro-1,5-Methanopyrido[1,2-a][1,5] Diazocin-8-One (9-Nitrocytisine), C11h13o3n3},
author = {A. Gald\'{a}mez and M. Gutierrez-Hernandez and B.K. Cassels and P. Saez-Briones},
url = {/brokenurl#<Go to ISI>://WOS:000290700500016},
doi = {10.4067/S0717-97072011000100016},
issn = {0717-9324},
year = {2011},
date = {2011-01-01},
journal = {Journal of the Chilean Chemical Society},
volume = {56},
number = {1},
pages = {595-597},
abstract = {The title compound (1, trivial name: 9 (or 3)-nitrocytisine) crystallizes with two independent molecules in the asymmetric unit. In its structure two rings form a bispidine framework that is fused to a 3-nitro-2-pyridone group. The half-normal probability plot reveals that the two molecules do not show any significant geometrical differences, except in conformations of the nitro-group, which is involved in intermolecular interactions. The crystal packing structure of the title compound is described in terms of three-dimensional supramolecular arrays built up from chains of N-H center dot center dot center dot O (nitro-group), hydrogen bonds and weak intermolecular C-H center dot center dot center dot O=C interactions, with graph-set descriptors C-2(2)(6) and C-2(2)(10) motifs, which together result in R-4(4)(26) rings motifs. These chains are additionally stabilized by intermolecular NO2.pi interactions.},
keywords = {agonists, alpha-4-beta-2, crystal cytisine cytisinoid, derivatives, design diffraction, halogenated hydrogen-bond, in-vivo, nicotinic patterns, smoking-cessation, structure, therapeutic-efficacy, x-ray},
pubstate = {published},
tppubtype = {article}
}