The interaction of ns2‐type cations in the ternary title compounds, which crystallize in a Tl4HgB... more The interaction of ns2‐type cations in the ternary title compounds, which crystallize in a Tl4HgBr6‐type structure, is discussed.
The title compound, previously obtained under hydrothermal conditions from HCl solution, crystall... more The title compound, previously obtained under hydrothermal conditions from HCl solution, crystallizes in the monoclinic system, space group P21/c with Z=4.
The crystal structures of two compounds containing enaminone heterodiene systems and forming inte... more The crystal structures of two compounds containing enaminone heterodiene systems and forming intermolecular hydrogen bonds N-H·O are reported: 1) 3-ethoxycarbonyl-2-methyl-4-pyridone (hereafter ETPY) and 2) 3-ethoxycarbonyl-2-phenyl-6-methoxycarbonyl-5,6-di-hydro-4-pyridone (hereafter EPPY). The crystal packing is controlled by intermolecular hydro gen bonds N-H·O = C connecting the heteroconjugated enaminone groups in infinite chains. In ETPY crystals the intermolecular hydrogen bond involves the heterodienic pathway with the highest π-delocalization that is effective for a very short N·O distance of 2.701(9) Å (average from two molecules in the asymmetric unit). Probably due to the steric hindrance, the hydrogen bond in EPPY is formed following the heterodienic pathway that involves the ester C = O group, although π-delocalization along this pathway is less than that along the pyridone-part pathway resulting in a longer N·O distance of 2.886(3) Å
The interaction of ns2‐type cations in the ternary title compounds, which crystallize in a Tl4HgB... more The interaction of ns2‐type cations in the ternary title compounds, which crystallize in a Tl4HgBr6‐type structure, is discussed.
The title compound, previously obtained under hydrothermal conditions from HCl solution, crystall... more The title compound, previously obtained under hydrothermal conditions from HCl solution, crystallizes in the monoclinic system, space group P21/c with Z=4.
The crystal structures of two compounds containing enaminone heterodiene systems and forming inte... more The crystal structures of two compounds containing enaminone heterodiene systems and forming intermolecular hydrogen bonds N-H·O are reported: 1) 3-ethoxycarbonyl-2-methyl-4-pyridone (hereafter ETPY) and 2) 3-ethoxycarbonyl-2-phenyl-6-methoxycarbonyl-5,6-di-hydro-4-pyridone (hereafter EPPY). The crystal packing is controlled by intermolecular hydro gen bonds N-H·O = C connecting the heteroconjugated enaminone groups in infinite chains. In ETPY crystals the intermolecular hydrogen bond involves the heterodienic pathway with the highest π-delocalization that is effective for a very short N·O distance of 2.701(9) Å (average from two molecules in the asymmetric unit). Probably due to the steric hindrance, the hydrogen bond in EPPY is formed following the heterodienic pathway that involves the ester C = O group, although π-delocalization along this pathway is less than that along the pyridone-part pathway resulting in a longer N·O distance of 2.886(3) Å
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Papers by Wolfgang Milius