Search results for "160"
showing 10 items of 462 documents
Crystal and solution structures of di-n-butyltin(IV) complexes of 5-[(E)-2-(4-methoxyphenyl)-1-diazenyl]quinolin-8-ol and benzoic acid derivatives: E…
2009
Abstract Reactions of nBu2SnCl(L1) (1), where L1 = acid residue of 5-[(E)-2-(4-methoxyphenyl)-1-diazenyl]quinolin-8-ol, with various substituted benzoic acids in refluxing toluene, in the presence of triethylamine, yielded dimeric mixed ligand di-n-butyltin(IV) complexes of composition [nBu2Sn(L1)(L2–6)]2 where L2 = benzene carboxylate (2), L3 = 2-[(E)-2-(2-hydroxy-5-methylphenyl)-1-diazenyl]benzoate (3), L4 = 5-[(E)-2-(4-methylphenyl)-1-diazenyl]-2-hydroxybenzoate (4), L5 = 2-{(E)-4-hydroxy-3-[(E)-4-chlorophenyliminomethyl]-phenyldiazenyl}benzoate (5) and L6 = 2-[(E)-(3-formyl-4-hydroxyphenyl)-diazenyl]benzoate (6). All complexes (1–6) have been characterized by elemental analyses, IR, 1H,…
Desulfurization and ring opening of thiirane induced by tantalocene trihydride complexes: Synthesis, reactivity and X-ray structure of Cp′2Ta(=S)(S-i…
1999
The reaction of the tantalocene trihydride complexes Cp′ 2 TaH 3 1 (Cp′= η 5 -C 5 H 4 t Bu) or Cp″CpTaH 3 1′ (Cp″= η 5 -C 5 H 2 -1,2-Me 2 -4- t Bu) with propylene sulfide was found to proceed via an unprecedented sulfur transfer and regioselective ring opening reaction at once to yield sulfido-thiolato tantalocene complexes Cp′ 2 Ta(S)(S- i Pr) 2a whose structure has been determined by X-ray crystallography or Cp″CpTa(S)(S- i Pr) 2′a . Complex 1 reacts with ethylene sulfide to give Cp′ 2 Ta(S)(S–Et) 2b . The reactivity of 2a towards a variety of electrophilic moities has been investigated: protonation (with HBF 4 ) and alkylation (with MeI) reactions occur at the terminal sulfur ligand, …
Reactions of the hydrofluoroborate salts of open-chain analogues of Reissert compounds with some α,β-ethylenic esters
1999
The reaction of the hydrofluoroborate salt of an open-chain analogue of a Reissert compound with some α,β-ethylenic esters does not give a [4 + 2] cycloadduct, as previously described in the case of ethyl acrylate. The reaction starts with a 1,3-dipolar cycloaddition of a munchnone imine 5c, d. The [3 + 2] cycloadducts 13 evolve via a rearrangement–condensation sequence to give a substituted 2-pyridone derivative 18 or 19. The proposed mechanism has been verified by the isolation and structural X-ray analysis of some compounds of the reaction sequence.
Synthesis and stereochemical studies of 2-substituted thiazolidine-4-carboxamide derivatives
2000
A series of new 2-substituted thiazolidine-4-carboxamide derivatives which have potentially useful immunological properties, have been synthesized in a stereoselective manner by coupling 2-subsituted thiazolidine-4-carboxylic acids with amines or amino esters. The structure of these compounds was established by combination of NMR methods and by X-ray analysis.
Influence of the exchange and correlation functional on the structure of amorphous InSb and In3SbTe2 compounds
2016
We have investigated the structural, vibrational, and electronic properties of the amorphous phase of InSb and In3SbTe2 compounds of interest for applications in phase change non-volatile memories. Models of the amorphous phase have been generated by quenching from the melt by molecular dynamics simulations based on density functional theory. In particular, we have studied the dependence of the structural properties on the choice of the exchange-correlation functional. It turns out that the use of the Becke-Lee-Yang-Parr functional provides models with a much larger fraction of In atoms in a tetrahedral bonding geometry with respect to previous results obtained with the most commonly used P…
Supplemental Material, Participant_instructions_for_the_Graphic_Vignettes - School Bullying Through Graphic Vignettes: Developing a New Arts-Based Me…
2020
Supplemental Material, Participant_instructions_for_the_Graphic_Vignettes for School Bullying Through Graphic Vignettes: Developing a New Arts-Based Method to Study a Sensitive Topic by Daria Khanolainen and Elena Semenova in International Journal of Qualitative Methods
Supplemental Material, Appendix_1_-_Vignettes_1-4_(English_translation) - School Bullying Through Graphic Vignettes: Developing a New Arts-Based Meth…
2020
Supplemental Material, Appendix_1_-_Vignettes_1-4_(English_translation) for School Bullying Through Graphic Vignettes: Developing a New Arts-Based Method to Study a Sensitive Topic by Daria Khanolainen and Elena Semenova in International Journal of Qualitative Methods
sj-zip-1-smm-10.1177_0962280220941159 - Supplemental material for Nonlinear parametric quantile models
2020
Supplemental material, sj-zip-1-smm-10.1177_0962280220941159 for Nonlinear parametric quantile models by Matteo Bottai and Giovanna Cilluffo in Statistical Methods in Medical Research
SMM900901 Supplemental material - Supplemental material for On powerful exact nonrandomized tests for the Poisson two-sample setting
2020
Supplemental material, SMM900901 Supplemental material for On powerful exact nonrandomized tests for the Poisson two-sample setting by Stefan Wellek in Statistical Methods in Medical Research
sj-pdf-2-qhr-10.1177_1049732320982945 – Supplemental material for The Clip Approach: A Visual Methodology to Support the (Re)Construction of Life Nar…
2021
Supplemental material, sj-pdf-2-qhr-10.1177_1049732320982945 for The Clip Approach: A Visual Methodology to Support the (Re)Construction of Life Narratives by Riikka Talsi, Aarno Laitila, Timo Joensuu and Esa Saarinen in Qualitative Health Research