Browsing by Author "Can, SES"

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    Attachment to manganese or cobalt of a bulky tri(organosilyl)methyl ligand containing an NMe2 or an OMe donor group
    Al-Juaid, SS; Eaborn, C; El-Hamruni, SM; Hitchcock, PB; Smith, JD; Can, SES
    The organolithium compound Li(THF)(2){C(SiMe3)(2)(SiMe2NMe2)} reacted with one equivalent of MnCl2 to give [Mn(mu-Cl){C(SiMe3)(2)(SiMe2NMe2)}](2) (4) and with 0.5 equivalent of MnCl2 to give Mn{C(SiMe3)(2)(SiMe2NMe2)}(2) together with a small amount of the Mn-III compound [Mn(mu-O){C(SiMe3)(2)(SiMe2NMe2)}](2) (6) formed by adventitious admission of air. With CoBr2, the compound [Co(mu-Br){C(SiMe3)(2)(SiMe2NMe2)}](2) (7) was obtained. The reaction between the lithium compound Li(THF)(2){C(SiMe3)(2)(SiMe2OMe)} and MnCl2 in THF gave [Mn(THF)(mu-Cl){C(SiMe3)(2)(SiMe2OMe)}](2) (5). The crystal structures of compounds 4, 5, 6 and 7 were determined. Compounds 4 and 5 are the first manganese analogues of Grignard reagents containing Mn-C sigma-bonds to be characterised in the solid state. (C) 2002 Elsevier Science B.V. All rights reserved.
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    Spectroscopic and luminescence properties of an isonicotinic acid
    Can, N; Ataç, A; Bardak, F; Can, SES
    An isonicotinic acid N-oxide Zn(II) compound was characterized on the basis of elemental analysis. FTIR spectra of the compound and free isonicotinic acid N-oxide (INO) were recorded in the range 4000-400 cm(-1). Cathodoluminescence (CL) spectra from the Zn(INO)(2) complex were recorded. The luminescence data were interpreted in terms of the emission band at 470 inn. The green luminescence (similar to 470 nm) arises from Zn2+ transition T-4(1) ((4)G) --> (6)A(1) (S-6). It shows a weak vibronic structure. and short lifetimes less than 150 mu s. The lifetime and intensity of the signal are temperature dependent, and the parameters are reported for the 470 nm emission line.
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    Structural characterization and luminescence properties of an isonicotinic acid N-oxide Mn(II) complex
    Can, N; Can, SES; Ataç, A; Bardak, F
    An isonicotinic acid N-oxide Mn(II) compound was synthesized and characterized on the basis of elemental analysis and X-ray crystallography. In the complex, Mn(II) ions are coordinated by six water molecules, and the coordination number of the Mn(II) ion is six. FTIR spectra of the compound free isonicotinic acid N-oxide (INO) have been recorded in the range 4000-400 cm(-1) Cathodoluminescence (CL) spectra from the Mn(II) complex have been recorded. The luminescence data were interpreted in terms of the emission band at 480 nm. The green luminescence (similar to480 nm) arises from the Mn2+ transition T-4(1) ((4)G)-->(6)A(1) (S-6). It shows weak vibronic structure. short lifetimes less than 250 mus, and indicates that Mn2+ is octahedrally coordinated, occupying sites with similar distortions. The lifetime and intensity of the signal is temperature dependent, and the parameters are reported for the 480 nm emission line. (C) 2004 Elsevier Ltd. All rights reserved.