[PDF] Top 20 Propuesta de un plan de seguridad y salud en el trabajo basado en la norma 29783 para minimizar riesgos laborales en la empresa Metalarc S.R.L, Cajamarca, 2017
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Crystal structures of 2 (2 bromo 5 fluorophenyl) 8 ethoxy 3 nitro 2H thiochromene and 2 (2 bromo 5 fluorophenyl) 7 methoxy 3 nitro 2H thiochromene
... the thio- chromene plane is almost perpendicular to the phenyl ...the crystal packing of B, molecules are linked by C—H F, C— H O, C—H and – ... See full document
73
The crystal structures of two new coumarin derivatives: 2 (4 {2 [(2 oxo 2H chromen 4 yl)oxy]acetyl}piperazin 1 yl)acetamide and N (2,4 dimethoxybenzyl) 2 [(2 oxo 2H chromen 4 yl)oxy]acetamide
... the chromene ring and the four planar C atoms of the piperazine ring in (I) and the benzene ring in (II) are ...the crystal of (I), there are also C—H and offset – interactions [intercentroid distance = ... See full document
6
Succinimidyl 7 methoxy 2H chromene 3 carboxylate
... The crystal structure is stabilized by weak intermolecular C—H O hydrogen bonds (Table 1 and ...Fig. 2) and – stacking interactions with Cg1 Cg2 iii = ... See full document
60
8 Methoxy 2H chromene 3 carbaldehyde
... the crystal, weak C—H···O hydrogen bonds link molecules along [001] ...(Fig. 2). Examples of structures of chromene compounds have been published (Yusufzai et ... See full document
185
Crystal structure of 7 iodo 4 oxo 4H chromene 3 carbaldehyde
... halogenated 3-formyl- chromones relevant to urease inhibitory activity and halogen bonding, I herein report the crystal structure of 7-iodo-4-oxo- 4H-chromene-3-carbaldehyde ...the ... See full document
39
SYNTHESIS AND BIOLOGICAL ACTIVITIES OF FUSED HETEROARYLS
... of 3-[benzimidazo(1,2-c)quinazolin-5-yl]- 2H-chromene-2-one (6a-6f) and 3-[benzothiadiazoleimidazo(1,2-c)quinazolin-5-yl]-2H- chromene-2-one (7a-7f) derivatives ... See full document
53
Crystal structure of the triethylammonium salt of 3 [(4 hydroxy 3 methoxyphenyl)(4 hydroxy 2 oxo 2H chromen 3 yl)methyl] 2 oxo 2H chromen 4 olate
... The molecular structure of the title compound is shown in Fig. 1. The deprotonation of one hydroxy-coumarin substit- uent but not the other leads to a short intramolecular negative charge-assisted hydrogen bond between ... See full document
93
Crystal structure of 7 bromo 4 oxo 4H chromene 3 carbaldehyde
... the crystal, molecules are linked into tapes through C—H O hydrogen bonds and these tapes are assembled by stacking interactions [centroid–centroid distance between the pyran rings = ... See full document
211
Crystal structure of 2 amino 7 hydroxy 4 (4 hydroxyphenyl) 4H chromene 3 carbonitrile
... the crystal structure, N—H···O, O—H···O, O—H···N and C—H···O hydrogen bonds link the adjacent molecules, forming the three dimensional network (Table 1, ...Fig. 2). In addition, a weak π-π stacking ... See full document
151
Crystal structures and Hirshfeld surface analyses of (E) N′ benzylidene 2 oxo 2H chromene 3 carbohydrazide and the disordered hemi DMSO solvate of (E) 2 oxo N′ (3,4,5 trimethoxybenzylidene) 2H chromene 3 carbohydrazide: lattice energy and intermolecular interaction energy calculations for the former
... both structures, data collection: CrysAlis PRO (Rigaku OD, 2019); cell refinement: CrysAlis PRO (Rigaku OD, 2019); data reduction: CrysAlis PRO (Rigaku OD, 2019); program(s) used to solve structure: OSCAIL ... See full document
72
Crystal structures and Hirshfeld surface analyses of (E) N′ benzylidene 2 oxo 2H chromene 3 carbohydrazide and the disordered hemi DMSO solvate of (E) 2 oxo N′ (3,4,5 trimethoxybenzylidene) 2H chromene 3 carbohydrazide: lattice energy and intermolecular interaction energy calculations for the former Corrigendum
... Geometry . All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, ... See full document
232
Crystal structure of ethyl (4R) 2 amino 7 hydroxy 4 phenyl 4H chromene 3 carboxylate
... the crystal, molecules are linked into N—H O hydrogen- bonded inversion dimers which are then connected into chains along [001], forming a two-dimensional network parallel to (100) via O—H O hydrogen ... See full document
151
6 Methyl 2 oxo N (quinolin 6 yl) 2H chromene 3 carboxamide: crystal structure and Hirshfeld surface analysis
... Geometry . All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, ... See full document
185
Ethyl-8-ethoxy-2-oxo-2H -chromene-3-carboxylate: Synthesis, characterization, crystal and molecular structure and Hirshfeld surface analysis
... 17.9307(14) Å , c = 9.9423(8) Å, β = 100.974(3)º, Z = 4, V = 1318.81(18) Å 3 . The structure exhibits an inter- molecular hydrogen bond of the type C-H…O. Hirshfeld analysis was carried out in order to ... See full document
7
Studies on the synthesis and antimicrobial activity of 2 oxo 2H chromene 3 carbohydrazide derivatives
... compounds, 2-oxo-2H-chromenes are associated with a broad spectrum of biological ...Many 2-oxo-2H-chromenes have been reported to possess antibacterial[1 ] , antifungal[2 ] ... See full document
82
2 Hydroxy 3,3 dimethyl 7 nitro 3,4 dihydroisoquinolin 1(2H) one
... Geometry . All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, ... See full document
65
Recent Advancements and Biological Activities of Aryl Propionic Acid Derivatives: A Review
... The aryl propionic acid derivatives belong to an important class of NSAIDs (Non Steroidal Anti-inflammatory Drugs). Ibuprofen, chemically called 2-(4-isobutyl phenyl) propionic acid, is a well known NSAID. Aryl ... See full document
26
N [1 Hydroxy 3 (methylsulfanylmethylsulfinyl)propan 2 yl] 2 oxo 2H chromene 3 carboxamide
... Sparsomycin, a metabolite of Streptomyces sparsogenes or Streptomyces cuspidosporus (Argoudelis & Herr, 1962), exhibits broad-spectrum antibiotic activity against a variety of Gram-negative and Gram-positive ... See full document
56
4 (Octyloxy)phenyl 2 oxo 2H chromene 3 carboxylate
... Geometry . All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in ... See full document
33
Crystal structure of 7 [(2E) 2 benzylidene 3 oxobutoxy] 4 methyl 2H chromen 2 one
... significant conformational differences between the molecules relating in particular to the relative orientation of the 3-oxo-2- (phenylmethylidene)butoxy substituent with respect to the super-imposable ... See full document
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