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- W1561079025 abstract "The new compounds Me3GeN(SO2Me)2 (3) and Me3PbN(SO2Me)2 (4) were prepared from the corresponding chlorides Me 3ECl and AgN(SO2Me)2 in MeCN solution. The crystallographic data at −95°C are for 3: triclinic, space group P1, a 771.7(2), b 1204.1(4), c 1388.4(5) pm, α 66.75(3), β 84.12(3), γ 74.15(2)°, V 1.1401 nm3, Z = 4; for 4: monoclinic, space group P21/c, a 751.1(3), b 1065.5(4), c 1493.9(5) pm, β 100.99(3)°, V 1.1738 nm3, Z = 4. The crystal structure of 3 consists of two crystallographically independent, monomeric molecules with tetrahedral Ge atoms and trigonal- planar N atoms (average angle values: CGeC 112.7, CGeN 106.0, GeNS 121.1, SNS 117.3 °). The most striking features of the molecular structure are the extremely long GeN bond distances of 198.2(2) and 198.5(2) pm, which are equal to the uncorrected sum of the covalent single bond radii. In the crystal structure of 4, Me3PbN(SO2Me)2 units are linked by an intermolecular PbO interaction (265.3(6) pm) to form infinite parallel chains. The Pb atom has a distorted trigonal-bipyramidal arrangement (NPbO 169.3; average values: CPbC 119.2, CPbN 95.5, CPbO 84.8°), in which the N atom is trigonal-planar (SNS 119.2, mean PbNS 119.8°). The PbN distance is 248.4(6) pm, i.e. 30 pm longer than the sum of the covalent radii, suggesting a mainly ionic bond character. In both structures secondary intramolecular 1,4-interactions with Ge ⋯ O distances of 295.8 and Pb ⋯ O of 328 pm, respectively, are observed. Die neuen Verbindungen Me3GeN(SO2Me)2 (3) und Me3PbN(SO2Me)2 (4) wurden aus den entsprechenden Chloriden Me3ECl und AgN(SO2Me)2 in MeCN-Lösung erhalten. Die bei −95°C ermittelten kristallographischen Daten sind für 3: triklin, Raumgruppe P1, a 771.7(2), b 1204.1 (4), c 1388.4(5) pm, α 66.75(3), β 84.12(3), γ 74.15(2)°, V 1.1401 nm3, Z = 4; für 4: monoklin, Raumgruppe P21/c, a 751.1(3), b 1065.5(4), c 1493.9(5) pm, β 100.99(3)°, V 1.1738 nm3, Z = 4. 3 bildet einen Molekülkristall mit zwei kristallographisch unabhängigen, monomeren Molekülen. Das Ge-Atom ist tetraedrisch, das N-Atom trigonal-planar koordiniert (Winkelmittelwerte: CGeC 112.7, CGeN 106.0, GeNS 121.1, S NS 117.3°). Hervorstechendes Strukturmerkmal sind die extrem langen GeN-Bindungsabstände von 198.2(2) bzw. 198.5(2) pm, die der unkorrigierten Summe der Einfachbindungsradien entsprechen. In der Kristallstruktur von 4 sind Me3PbN(SO2Me)2-Einheiten über eine intermolekulare PbO-Wechselwirkung (265.3(6) pm) zu unendlichen, parallel angeordneten Ketten verknüpft. Das Pb-Atom besitzt eine verzerrte trigonal-bipyramidale Umgebung (NPbO 169.3; Mittelwerte: CPbC 119.2, CPbN 95.5, C PbO 84.8°), das N-Atom ist trigonal-planar gebunden (SNS 119.2, Mittelwert PbNS 119.8°). Der Pb N-Abstand ist mit 248.4(6) pm um 30 pm größer als die Summe der Kovalenzradien, entsprechend einer Bindung mit überwiegend ionischem Charakter. In beiden Strukturen wird ein intramolkularer 1,4-Sekundärkontakt mit Ge ⋯ O 295.8 bzw. Pb ⋯ O 328 pm beobachtet." @default.
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- W1561079025 date "1993-08-01" @default.
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- W1561079025 title "Polysulfonylamine" @default.
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