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Polymere Iodoplumbate – Synthese und Kristallstrukturen von (Pr3N–C2H4–NPr3)[Pb6I14(dmf)2] · 4 DMF, (Pr3N–C2H4–NPr3)[Pb(dmf)6][Pb5I14] · DMF und (Me3N–C2H4–NMe3)2[Pb2I7]I

✍ Scribed by Harald Krautscheid; Frieder Vielsack; Nicole Klaassen

Publisher
John Wiley and Sons
Year
1998
Tongue
German
Weight
162 KB
Volume
624
Category
Article
ISSN
0372-7874

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✦ Synopsis

Inhaltsu È bersicht. (Pr 3 N±C 2 H 4 ±NPr 3 )[Pb 6 I 14 (dmf) 2 ] ´4 DMF (1) und (Pr 3 N±C 2 H 4 ±NPr 3 )[Pb(dmf) 6 ][Pb 5 I 14 ] ´DMF (2) haben bei nahezu gleicher Zusammensetzung vo È llig verschiedene Strukturen. Sie bilden sich selektiv je nach Synthese-und Kristallisationsbedingungen. Wa È hrend in 2 neben den I ± -koordinierten Pb-Atomen im anionischen [Pb 5 I 14 ] 4± -Netzwerk auch [Pb(dmf) 6 ] 2+ -Kationen vorliegen, treten in (Me 3 N±C 2 H 4 ±NMe 3 ) 2 [Pb 2 I 7 ]I (3) zwischen den Iodoplumbatschichten isolierte I ± -Anionen auf. In 2 und 3 sind PbI 6 -Oktaeder u È ber gemeinsame Fla È chen und Ecken miteinander verknu È pft, in 1 bilden kantenverknu È pfte PbI 6 -bzw. PbI 5 (dmf)-Oktaeder polymere Stra È nge. (Pr 3 N±C 2 H 4 ±NPr 3 )[Pb 6 I 14 (dmf) 2 ] ´4 DMF (1): Raumgruppe P1, a = 920,1(3), b = 1597,2(5), c = 1613,9(4) pm, α = 66,02(2), b = 84,53(2), c = 85,99(2)°, V = 2156(1) ´10 6 pm 3 ; (Pr 3 N±C 2 H 4 ±NPr 3 )[Pb(dmf) 6 ][Pb 5 I 14 ] ´DMF (2): Raumgruppe P2 1 , a = 1201,21(9), b = 3031,1(2), c = 1294,96(9) pm, b = 108,935(7)°, V = 4459,8(5) ´10 6 pm 3 ; (Me 3 N±C 2 H 4 ±NMe 3 ) 2 [Pb 2 I 7 ]I (3): Raumgruppe Pnma, a = 2349,9(2), b = 1623,83(9), c = 980,75(7) pm, V = 3742,4(5) 10 6 pm 3 .

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