Search results for "HDI"
showing 10 items of 789 documents
Fluorine-containing functionalized cyclopentene scaffolds through ring contraction and deoxofluorination of various substituted cyclohexenes
2018
The fluorination of some highly‐functionalized cyclopentene derivatives, obtained from various substituted cyclohexenes through a ring‐opening/ring‐contraction procedure, has been investigated. The transformations were found to be highly substrate dependent, and led to the formation of various functionalized alicyclic compounds or heterocycles containing allyl difluoride or vinyl fluoride moieties. peerReviewed
Theoretical and computational studies of magnetic anisotropy and exchange coupling in molecular systems
2018
The field of molecular magnetism studies the magnetic properties of molecular systems as opposed to conventional metal-based magnets. The high chemical modifiability of the constituting molecules makes such materials highly versatile, and the small size of the building blocks leads to the rise of various quantum mechanical phenomena, such as tunneling and entanglement. These phenomena can then be further utilized in the construction of nanoscale quantum devices. This dissertation describes computational and theoretical studies in the field of molecular magnetism using state-of-the-art quantum chemical methods based on ab initio multireference approaches and broken symmetry density functional t…
Suhteellisen suhteetonta : näkemyksiä mediasuhteista ja lehdistötiedotteiden valinnasta maakuntalehdissä
2007
Controlling Oxidative Addition and Reductive Elimination at Tin(I) via Hemi-Lability.
2021
We report on the synthesis of a distannyne supported by a pincer ligand bearing pendant amine donors that is capable of reversibly activating E–H bonds at one or both of the tin centres through dissociation of the hemi-labile N–Sn donor/acceptor interactions. This chemistry can be exploited to sequentially (and reversibly) assemble mixed-valence chains of tin atoms of the type ArSn{Sn(Ar)H} n SnAr ( n = 1, 2). The experimentally observed (decreasing) propensity towards chain growth with increasing chain length can be rationalized both thermodynamically and kinetically by the electron-withdrawing properties of the –Sn(Ar)H– backbone units generated via oxidative addition. peerReviewed
Oxygen Transfer from Trimethylamine N-oxide to CuI Complexes Supported by Pentanitrogen Ligands
2020
[N,N-bis(1-methyl-2-benzimidazolyl)methyl-N-(bis-2-pyridylmethyl)amine] ( L 1 ) and [N,N-bis(2-quinolylmethyl)-N-bis(2-pyridyl)methylamine] ( L 2 ) were employed to prepare Cu II and Cu I complexes for spectroscopic and structural characterization. [ L 1 Cu II (H 2 O)](NO 3 ) 2 and [ L 2 Cu II (NO 3 )]NO 3 have Jahn-Teller distorted octahedral geometries, and give rise to isotropic EPR spectra in frozen solution. [ L 1 Cu I (CH 3 CN)]OTf and [ L 2 Cu I (CH 3 CN)]OTf have distorted trigonal bipyramidal and tetrahedral solid-state structures, respectively. The N-donors display labile behavior in solution, based on variable-temperature 1 H NMR studies. Addition of trimethylamine N-oxide (Me …
Entrainment and its perturbation in the auditory cortex of the rat : phase and frequency modulations
2010
Tutkimuksen tavoitteena oli luoda oskillatorista tahdistamista rotan kuuloaivokuorella sekä valikoivasti häiritä sitä. Tahdistamista ei ole juuri lainkaan tutkittu aiemmin, joten tutkimuksessa yritettiin löytää uutta tietoa käyttäen ainutlaatuista kokeellista asetelmaa. Viisitoista rottaa nukutettiin uretaanilla ja niiltä mitattiin paikallisia kenttäpotentiaaleja (local field potentials,LFPs) kovakalvon päälle sijoitetun solun ulkopuolisen mikroelektrodin avulla. Neljässä pääkokeessa luotiin 2,5 Hz tahdistamista yhdeksän ärsykkeen äänijonoilla, missä tahdistamisäänen taajuus oli 4000 Hz ja häiritsevän äänen taajuus oli 4500 Hz. Häirintä oli aina kahdeksannessa äänessä, jonka vaihetta ja/tai…