• Title/Summary/Keyword: no-chemical

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A Study on Synthesis and Characterization of Dinitrosylmolybdenum Complexes (디니트로실 몰리브덴 착물의 합성과 특성에 관한 연구)

  • Doh, Kiel Myung;Kim, Ill Chool;Choi, Bo Yong
    • Journal of the Korean Chemical Society
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    • v.39 no.3
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    • pp.191-197
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    • 1995
  • The reactions of [${Mo(NO)_2Cl_2}_n$] with unidentate ligands in $CH_2Cl_2$ solvent afforded monomeric complexes [$Mo(NO)_2L_2Cl_2$]. $[Mo(NO)_2L_4](ClO_4)_2$ was obtained by reaction of unidentate with $[Mo(NO)_2L_2Cl_2]$ in aceton solvent. 4-Dimethylaminopyridine(dmap), pyridine(py), and isoquinoline(isoq) were used as coordinating ligands. These dinitrosylmolybdenum complexes are prepared and characterized by elemental analysis, $^1H$ NMR, infrared, and UV-Visible spectroscopy. The infrared spectra indicate that the NO groups occupy cis-positions of the octahedral.

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Effect of Alkali Metal Nitrates on the Ru/C-catalyzed Ring Hydrogenation of m-Xylylenediamine to 1,3-Cyclohexanebis(methylamine)

  • Kim, Young Jin;Lee, Jae Hyeok;Widyaya, Vania Tanda;Kim, Hoon Sik;Lee, Hyunjoo
    • Bulletin of the Korean Chemical Society
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    • v.35 no.4
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    • pp.1117-1120
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    • 2014
  • Ru/C-catalyzed hydrogenation of m-xylylene diamine into 1,3-cyclohexanebis(methylamine) was greatly accelerated by the presence of $LiNO_3$, $NaNO_2$, or $NaNO_3$. It was found that the effect of the nitrate salt was significantly affected by the size of cation. The promoting effect of the nitrate salt increased with the decrease of the cation size: $LiNO_3$ ~ $NaNO_2$ > $KNO_3$ > $CsNO_3$ >> [1-butyl-3-methylimidazolium]$NO_3$. XRD analysis of the recovered catalysts after the hydrogenation reactions showed that $LiNO_3$ and $NaNO_2$ were completely transformed into LiOH and NaOH, respectively, along with the evolution of $NH_3$, while $KNO_3$ and $CsNO_3$ remained unchanged.