Search results for "Imine"
showing 10 items of 2850 documents
Magnetic coupling and spin topology in linear oxalato-bridged tetranuclear chromium(III)–copper(II) complexes with aromatic diimine ligands
2013
Abstract A novel heterotetranuclear chromium(III)–copper(II) complex of formula {[CrIII(bpy)(ox)2]2CuII2(bpy)2(ox)}·6H2O (1) has been synthesized by the ligand exchange reaction between Ph4P[CrIII(bpy)(ox)2]·H2O and [CuII(bpy)2(NO3)]NO3·MeOH in methanol (bpy = 2,2′-bipyridine; ox2− = oxalate dianion). The X-ray crystal structure of 1 consists of neutral oxalato-bridged CrIII2Cu2II zigzag entities which are formed by the monodentate coordination of two [CrIII(bpy)(ox)2]− mononuclear anionic units through one of its two oxalato groups toward a [CuII2(bpy)2(ox)]2+ dinuclear cationic moiety featuring relatively long axial bonds at the square pyramidal CuII ions. Variable temperature (2.0–300 K)…
A Molecular Electron Density Theory Study of the Reactivity of Azomethine Imine in [3+2] Cycloaddition Reactions
2017
The electronic structure and the participation of the simplest azomethine imine (AI) in [3+2] cycloaddition (32CA) reactions have been analysed within the Molecular Electron Density Theory (MEDT) using DFT calculations at the MPWB1K/6-311G(d) level. Electron localisation function (ELF) topological analysis reveals that AI has a pseudoradical structure, while the conceptual DFT reactivity indices characterise this TAC as a moderate electrophile and a good nucleophile. The non-polar 32CA reaction of AI with ethylene takes place through a one-step mechanism with low activation energy, 5.3 kcal/mol-1. A bonding evolution theory (BET) study indicates that this reaction takes place through a non-…
Current L2 self-concept of Finnish comprehensive school students : The role of grades, parents, peers, and society
2021
L2 (second/foreign language) motivation research in Finland has been scarce. Furthermore, international motivational research has focused more on ideal and ought-to selves, leaving the current L2 self-concept in the background. In the present study, we attempted to address this gap, exploring what shapes L1 (mother tongue) Finnish students' understanding of themselves as users and learners of L2s. Using structural equation modelling, we studied the relationships between students' (n = 1206) current L2 self-concept and parental encouragement, peer pressure, societal expectations, and grades. We further studied which of these factors are the best predictors of students' current L2 self-concep…
Transformative Teaching and Learning Through Engaged Practice : Lecturers’ and Students’ Experiences in a University and Underserved Community Partne…
2018
peer-reviewed The Community Wellness, Empowerment, Leadership and Lifeskills (CWell) program is a two-year community-driven program developed in partnership between an underserved-community in Limerick City, and staff at the University of Limerick (UL), Ireland. This paper explores the transformative teaching and learning experiences that arose throughout the duration of the progam for the lecturers and students. Data were collected through interviews and focus groups with lecturers and students involved in the program. Students supported the notion of “learning differently” and focused around prior learning and attitude to learning, learning about learning and impact of learning. Lecturers…
The integration of content and language in students’ task answer production in the bilingual classroom
2016
The notion of content and language integration has recently become a key topic of inquiry in research on content and language integrated learning and other kinds of bilingual educational programmes. Understanding what integration is and how it happens is of fundamental importance not only for researchers interested in gauging the possibilities and limitations of bilingual programmes, but also for practitioners seeking optimal ways to support student development. This study investigates integration as it takes place in the context of collaborative writing in the classroom. Drawing on conversation analytic methodology, text production is investigated as a social and sequentially evolving phen…
From interdependence to agency
2011
Maahanmuuttajien määrä Suomessa on kasvanut räjähdysmäisesti sitten 1990-luvun. Muutos väestörakenteessa vaikuttaa myös suomalaisten koulujen arkeen ja opettajien työhön, mutta tutkimusta maahanmuuttajista erityisesti kieliaineiden oppijina on vähän. Tämän tutkimuksen tarkoituksena olikin selvittää millainen maahanmuuttajan kielellinen ympäristö Suomessa on ja erityisesti sitä millainen vaikutus sillä on kielten oppimiseen. Tutkimus tarkastelee maahanmuuttajia toiminnan teorian valossa, ja vastauksia haettiin seuraaviin kysymyksiin: 1) miten maahanmuuttajaoppijat käsitteellistävät itsensä englannin ja suomen kielten oppijina, 2) minkälaisia välittyneisyyden keinoja he käyttävät englannin ja…
"Ihan uskomatonta miten pieni lapsi imee sitä kieltä itseensä" : vanhempien näkökulma vieraan kielen oppimiseen
2015
Tutkimuksen kohteena oli vieraan kielen oppiminen ja opettaminen osana varhaiskasvatusta. Ilmiö on ajankohtainen, sillä vierasta kieltä tarjoavien varhaiskasvatusryhmien määrä on lisääntynyt globalisoituvassa maailmassa. Tutkimus keskittyi vanhempien näkökulmaan. Tavoitteena oli selvittää heidän syitä valita lapselleen varhaiskasvatus, jossa lapsi oppii vierasta kieltä, vanhempien odotuksia kielen oppimiselle ja odotuksiin vastaamista sekä suunnitelmia tukea lapsen kielen oppimista varhaiskasvatuksen jälkeen. Tutkimus toteutettiin laadullisena tutkimuksena ja aineistonkeruu tapahtui teemahaastattelulla. Yksilöhaastatteluun osallistui seitsemän vanhempaa, joiden lapsi osallistui varhaiskasva…