491 research outputs found
Formation and Rearrangement of Reduced Diiminepyridine Complexes of Zr and Hf
No full textReduction of seven-coordinate [(EtDIP)MCl4] {EtDIP = 2,6-(2,6-Et2–C6H3N=CMe)2C5H3N; M = Zr or Hf} produces formally divalent complexes [(EtDIP)MCl2] containing in reality a doubly reduced DIP ligand. The Hf complex is five-coordinate, but the Zr analog crystallizes as a chloride-bridged dimer with an unusual coordination geometry; the monomer-dimer equi- librium is fast at room temperature. Reaction of [(EtDIP)HfCl2] with MeMgBr or LiCH2SiMe3 produced the corresponding dialkyls [(EtDIP)HfR2]. An unexpected ligand isomerization to an amido/enamido form was observed for [(EtDIP)ZrCl2], [(EtDIP)- HfMe2] and [(EtDIP)TiMe2], and a mechanism is proposed based on DFT calculations
CCDC 1545713: Experimental Crystal Structure Determination
No full textQAQDUK : trichloro-(1,1'-(pyridine-2,6-diyl)bis(N-(2,6-diethylphenyl)ethan-1-imine))-titanium(iii) tetrahydrofuran solvate Space Group: P 21/c (14), Cell: a 14.227(6)Å b 13.991(5)Å c 17.329(7)Å, α 90.0° β 98.034(7)° γ 90.0° Related Article: Naser Rahimi, Bas de Bruin, Peter H. M. Budzelaar|2017|Organometallics|36|3189|doi:10.1021/acs.organomet.7b00239,An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
CCDC 1545718: Experimental Crystal Structure Determination
No full textQAQFUM : (1,1'-(pyridine-2,6-diyl)bis(N-(2,6-diethylphenyl)ethan-1-imine))-bis((trimethylsilyl)methyl)-titanium Space Group: P b c a (61), Cell: a 15.675(8)Å b 19.648(8)Å c 25.516(10)Å, α 90.0° β 90.0° γ 90.0° Related Article: Naser Rahimi, Bas de Bruin, Peter H. M. Budzelaar|2017|Organometallics|36|3189|doi:10.1021/acs.organomet.7b00239,An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
CCDC 1545714: Experimental Crystal Structure Determination
No full textQAQFAS : dichloro-(1,1'-(pyridine-2,6-diyl)bis(N-(2,6-diethylphenyl)ethan-1-imine))-titanium Space Group: P 21/c (14), Cell: a 18.398(11)Å b 8.797(5)Å c 18.471(11)Å, α 90.0° β 102.164(8)° γ 90.0° Related Article: Naser Rahimi, Bas de Bruin, Peter H. M. Budzelaar|2017|Organometallics|36|3189|doi:10.1021/acs.organomet.7b00239,An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
CCDC 1545717: Experimental Crystal Structure Determination
No full textQAQFOG : dimethyl-(1,1'-(pyridine-2,6-diyl)bis(N-(2,6-diethylphenyl)ethan-1-imine))-titanium Space Group: P b c a (61), Cell: a 15.554(9)Å b 18.050(9)Å c 20.829(10)Å, α 90.0° β 90.0° γ 90.0° Related Article: Naser Rahimi, Bas de Bruin, Peter H. M. Budzelaar|2017|Organometallics|36|3189|doi:10.1021/acs.organomet.7b00239,An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
CCDC 1545716: Experimental Crystal Structure Determination
No full textQAQFIA : chloro-phenyl-(1,1'-(pyridine-2,6-diyl)bis(N-(2,6-diethylphenyl)ethan-1-imine))-titanium benzene solvate Space Group: P 1 (2), Cell: a 9.7379(3)Å b 13.9704(4)Å c 13.9669(4)Å, α 108.0254(16)° β 110.2193(15)° γ 94.6783(16)° Related Article: Naser Rahimi, Bas de Bruin, Peter H. M. Budzelaar|2017|Organometallics|36|3189|doi:10.1021/acs.organomet.7b00239,An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
CCDC 1545715: Experimental Crystal Structure Determination
No full textQAQFEW : chloro-methyl-(1,1'-(pyridine-2,6-diyl)bis(N-(2,6-diethylphenyl)ethan-1-imine))-titanium toluene solvate Space Group: P 1 (2), Cell: a 10.063(3)Å b 12.566(4)Å c 14.130(5)Å, α 89.031(7)° β 76.156(10)° γ 84.728(18)° Related Article: Naser Rahimi, Bas de Bruin, Peter H. M. Budzelaar|2017|Organometallics|36|3189|doi:10.1021/acs.organomet.7b00239,An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Ecriture au feminin par procuration : Pierre de patience d'Atiq Rahimi
No full textThe author proposes a feminist interpretation of Pierre de patience, a novel by the afghan francophone writer Atiq Rahimi. He sees it as a francophone text come from elsewhere, as world literature, but also as a message and hope for our time and for gender equality
THE LURE OF THE IMAGE KEBOHONGAN PADA NARASI PEREMPUAN DALAM SYNGUE SABOUR PIERRE DE PATIENCE KARYA ATIQ RAHIMI
No full textThis study aims to determine the position of the author in women narration. With Rahimi’s background as a feminist, he said that with his novel he voiced the voices of Afghan women. Rahimi offered a strong female figure in the middle of the patriarchal shackles who is able to fight the system. The problem of this study is Rahimi’s ambiguity in narrating women. To determine the position of the author, the research uses the concept of the lure of the image belongs to Lidia Curti. The lure of the image is an offer provided by the author to give positions to women that are in fact not provided by them. Based on the research conducted, the results show that Rahimi keeps women as objects in a patriarchal world. In this case he is not able to pull the women out of the patriarchal zone. The space given to women by Rahimi reinforces male power. What Rahimi written in this novel is the lure of the image according to Curti’s concept which explains it as an image of women given by author or known as female gaze
Balance between Metal and Ligand Reduction in Diiminepyridine Complexes of Ti
No full textReaction of the diiminepyridine ligand EtDIP (2,6-Et2- C6H3NCMe)2C5H3N) with TiCl3(THF)3 gave the corresponding Ti(III) complex (EtDIP)TiCl3 (1). Reduction of 1 with 1 equiv of KC8 produced the formally Ti(II) complex (EtDIP)TiCl2 (2). From this, (EtDIP)TiClR complexes (R = Me (3a), Me3SiCH2 (3b), Ph (3c)) were obtained by addition of 1 equiv of RLi. Similarly, dialkyl complexes (EtDIP)TiR2 (R = Me (4a), Me3SiCH2 (4b)) were obtained with 2 equiv of RLi. All new complexes except 3b were characterized by single-crystal X-ray diffraction. EPR studies indicate that complex 1 is best regarded as a true Ti(III) complex with an “innocent” DIP ligand. Complexes 2−4 are all diamagnetic. In contrast to DIP complexes of the late transition metals Fe and Co, the new complexes 2−4 show strong upfield 1H NMR shifts for the pyridine β and γ protons caused by transfer of negative charge to the DIP ligand. On the basis of this and the CN and Cimine−CPy bond lengths, a description involving Ti(IV) and a dianionic ligand seems most appropriate, and DFT calculations support this interpretation. This means that reduction of Ti(III) complex 1 results in oxidation of the metal center to Ti(IV). VT-NMR studies of 4a suggest a small and temperature-dependent thermal population of a triplet state, and indeed calculations indicate that 4a has the lowest singlet− triplet energy difference of the systems studied
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