Search results for "Fluoride"

showing 10 items of 314 documents

CCDC 1552170: Experimental Crystal Structure Determination

2017

Related Article: Kaisa Helttunen, Riia Annala, Aku Suhonen, Elisa Nauha, Juha Linnanto, Maija Nissinen|2017|CrystEngComm|19|5184|doi:10.1039/C7CE01109A

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterstetrabutylammonium fluoride N2-{2-[(benzenecarbonyl)amino]phenyl}-N6-{2-[(4-cyanobenzene-1-carbonyl)amino]phenyl}pyridine-26-dicarboxamide hydrateExperimental 3D Coordinates
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CCDC 1425267: Experimental Crystal Structure Determination

2016

Related Article: T. Mäkelä, K. Rissanen|2016|Dalton Trans.|45|6481|doi:10.1039/C6DT00414H

Space GroupCrystallographyCrystal SystemCrystal Structurebis(11'-(2356891112-Octahydro-1471013-benzopentaoxacyclopentadecine-1516-diyl)bis(3-(4-nitrophenyl)urea))-rubidium fluoride diethyl ether methanol solvateCell ParametersExperimental 3D Coordinates
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CCDC 1552171: Experimental Crystal Structure Determination

2017

Related Article: Kaisa Helttunen, Riia Annala, Aku Suhonen, Elisa Nauha, Juha Linnanto, Maija Nissinen|2017|CrystEngComm|19|5184|doi:10.1039/C7CE01109A

Space GroupCrystallographyCrystal SystemCrystal Structuretetrabutylammonium fluoride N2N6-bis{2-[(2-nitrobenzene-1-carbonyl)amino]phenyl}pyridine-26-dicarboxamideCell ParametersExperimental 3D Coordinates
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CCDC 258439: Experimental Crystal Structure Determination

2005

Related Article: M.Gerken, J.P.Mack, G.J.Schrobilgen, R.J.Suontamo|2004|J.Fluorine Chem.|125|1663|doi:10.1016/j.jfluchem.2004.09.005

Space GroupCrystallographyCrystal Systembis(Tetramethylammonium) difluoro-dioxoiodide hydrogen difluorideCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1552173: Experimental Crystal Structure Determination

2017

Related Article: Kaisa Helttunen, Riia Annala, Aku Suhonen, Elisa Nauha, Juha Linnanto, Maija Nissinen|2017|CrystEngComm|19|5184|doi:10.1039/C7CE01109A

Space GroupCrystallographytetra-n-butylammonium N2-(2-benzamidophenyl)-N6-phenylpyridine-26-dicarboxamide fluorideCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1552172: Experimental Crystal Structure Determination

2017

Related Article: Kaisa Helttunen, Riia Annala, Aku Suhonen, Elisa Nauha, Juha Linnanto, Maija Nissinen|2017|CrystEngComm|19|5184|doi:10.1039/C7CE01109A

Space GroupCrystallographytetrabutylammonium fluoride N2-(2-aminophenyl)-N6-{2-[(benzenecarbonyl)amino]phenyl}pyridine-26-dicarboxamideCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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Comparison of magnetic resonance imaging of inhaled SF6 with respiratory gas analysis

2008

Magnetic resonance imaging of inhaled fluorinated inert gases ((19)F-MRI) such as sulfur hexafluoride (SF(6)) allows for analysis of ventilated air spaces. In this study, the possibility of using this technique to image lung function was assessed. For this, (19)F-MRI of inhaled SF(6) was compared with respiratory gas analysis, which is a global but reliable measure of alveolar gas fraction. Five anesthetized pigs underwent multiple-breath wash-in procedures with a gas mixture of 70% SF(6) and 30% oxygen. Two-dimensional (19)F-MRI and end-expiratory gas fraction analysis were performed after 4 to 24 inhaled breaths. Signal intensity of (19)F-MRI and end-expiratory SF(6) fraction were evaluat…

SpirometryCorrelation coefficientSwineSulfur HexafluorideBiomedical EngineeringBiophysicsAnalytical chemistrychemistry.chemical_elementFraction (chemistry)Sensitivity and SpecificityOxygenchemistry.chemical_compoundNuclear magnetic resonanceAdministration InhalationmedicineAnimalsRadiology Nuclear Medicine and imagingRespiratory systemLungReproducibilitymedicine.diagnostic_testPulmonary Gas ExchangeReproducibility of ResultsMagnetic resonance imagingImage EnhancementMagnetic Resonance ImagingSulfur hexafluorideBreath TestschemistrySpirometryMagnetic Resonance Imaging
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Syntheses and reactivity of oxo niobocene complexes Cp*2Nb(O)X (X=H, OCH3) and crystal structures of [Cp*2Nb(OH)F]BF4 and Cp*2Nb(O)OC(O)H (Cp*=η5-C…

1998

Abstract Reaction of Cp*2NbCl2 (Cp*=η5-C5Me5) with KOH or Ba(OH)2·8H2O in THF forms the complexes Cp*2Nb(O)X (X=Cl: 2, H: 3). The ratio of 2 and 3 depends on the stoichiometry. If NaOMe is added or MeOH in solution Cp*2Nb(O)OMe 4 is formed in good yields. Reactivity studies with 3 and 4 show that the NbO as well as the Nb–X unit behave as chemically active sites. Protonation of 3 or 4 with HBF4 is followed by an attack of fluoride (from BF4− anion) to give [Cp*2Nb(OH)F]BF4 6 and [Cp*2NbF2]BF4 7. In contrast the reaction of 3 or 4 with HCO2H results in an exchange of X− by formate to give Cp*2Nb(O)OC(O)H 8. The crystal structures of 6 and 8 are reported. Electrochemical investigations of…

StereochemistryOrganic ChemistryProtonationCrystal structureElectrochemistryBiochemistryMedicinal chemistryIonInorganic Chemistrychemistry.chemical_compoundchemistryMaterials ChemistryReactivity (chemistry)FormatePhysical and Theoretical ChemistryFluorideStoichiometryJournal of Organometallic Chemistry
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PHOSPHORORGANISCHE VERBINDUNGEN 991VERSUCHE ZUR AUFKLÄRUNG DER O-SELEKTIVITÄT VON VERBINDUNGEN MIT DER P(O)F-GRUPPE

1982

Abstract The mechanism of the reaction of phosphoryl fluoride ( P(O)F) with alcohols in the presence of an amine is fundamentally different from the reaction of phosphoryl chlorides ( P(O)Cl) with primary or secondary amines. The following observations strongly support this proposal: 1. 1H-NMR-, 31P-NMR- and 19F-NMR-spectroscopic investigations show that methyl-phenyl-phosphinicacid-fluoride and n-butylamine form a thermolabile adduct, which yields the methyl-phenyl-phosphinicacid-amide only very slowly. 2. The rate of the reaction of methyl-phenyl-phosphinicacid-fluoride with ethanol is independent of the basicity of the amine but very sensitive to steric factors. Imidazole (which is only …

Steric effectschemistry.chemical_compoundPhosphoryl fluoridechemistryStereochemistryImidazoleAmine gas treatingMethanolThermolabileWeak baseMedicinal chemistryAdductPhosphorus and Sulfur and the Related Elements
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Impact of public preventive programmes on oral quality of life of 11 to 12-yr-old school students

2007

Objectives: The objective was to analyze the impact of preventive programmes on oral quality of life in school students aged 11-12 yrs. Study design: In the school year 1996/97, a quasi-experimental study was initiated in Granada province with four groups of students aged 6-7 yrs: Sealant + Fluoride (sealants on first permanent molars applied in the health centre for a 3-yr active programme, and fluoride varnish applied every four months for 3 yrs, n=65), Sealant (only sealants, n=80), Fluoride (only fluoride varnish, n=107) and Control group (n=59). All students were examined every 6 months at school during the 3-yr active programme and received an oral health report after each examination…

Student programmessellador de fisuraseducationProgramas escolarescalidad de vida oralUNESCO::CIENCIAS MÉDICASoral quality of lifefluoride varnishfissure sealantbarniz de flúor:CIENCIAS MÉDICAS [UNESCO]
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