The reaction of 4‐[(CH2O)2CH]C6H4Br (1) with n‐BuLi, followed by addition of HgCl2 to the in situ formed organolithium derivative, affords [4‐{(CH2O)2CH}C6H4]2Hg (2). Deprotection of the formyl groups of 2 in presence of p‐TsOH (p‐Ts = 4‐MeC6H4SO3) leads to [4‐(O=CH)C6H4]2Hg (3). Condensation reactions of 3 with 2‐aminopyridine (2‐pyNH2), 4‐aminopyridine (4‐pyNH2), 2‐aminomethylpyridine (2‐pyCH2NH2), and 4‐aminomethylpyridine (4‐pyCH2NH2), in CH2Cl2, affords the novel diorganomercury(II) compounds of type [(E)‐4‐(RN=C)C6H4]2Hg [R = 2′‐py (4), 4′‐py (5), 2'‐pyCH2‐ (6), 4′‐pyCH2 (7)]. Compounds 2 and 3 were useful precursors for the preparation of the corresponding homocoupling products [4‐{(CH2O)2CH}C6H4]2 (8) and [4‐(O=CH)C6H4]2 (9) in presence of catalytic amounts of palladium(II) acetate. Compounds 2–9 were characterized by multinuclear magnetic resonance (NMR) (1H, 13C{1H}, and 199Hg{1H}, when appropriate) and infrared (IR) spectroscopy and by mass spectrometry. The molecular structures of 3, 5, 6, 8, and 9 were determined by single‐crystal X‐ray diffraction.
The first discrete mixed platinum(IV)-gold(III) oxoanion [PtIV2AuIII3O6((CH3)2AsO2)6]– (1) was synthesized by reaction of H2Pt(OH)6 with H[AuCl4] in a simple one-pot procedure in aqueous solution at pH 7 and comprises two...
The compound [2,6-(Me2NCH2)2C6H3]Hg(OAc) (1) was prepared by direct mercuration of 1,3-(Me2NCH2)2C6H4 with Hg(OAc)2. Treatment of 1 with excess of LiCl resulted in isolation of the chloride [2,6-(Me2NCH2)2C6H3]HgCl (2) in a good yield. The IR spectroscopy confirms the presence of the acetate group in 1. Both compounds 1 and 2 were characterized by solution multinuclear (1H, 13C and 199Hg) NMR spectroscopy and mass spectrometry. Their crystal and molecular structures were established by single-crystal X-ray diffraction. Different intermolecular interactions, i.e. Hg···Hg, O···Hg and C‒H···π (Arcentroid), were found for both compounds in solid state resulting in dimer or chain polymer associations.
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