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- W1989737269 abstract "Die im Titel genannte Achtringverbindung 6 stellt ein Analogon zum Octaphenyl-cyclotetraphosphazen dar, in dem zwei gegenüberliegende Stickstoff-Ringglieder durch zweifach-koordinierten Phosphor ersetzt sind. Sie ist aus (Ph2P)2NLi und P4 zugänglich und wird von sehr starken Nucleophilen an den PP-Bindungen angegriffen und im Sinne einer Syntheseumkehr abgebaut. Sie wird selektiv am zweifach-koordinierten Phosphor methyliert und bildet mit PdCl2 und PtCl2 durch Koordination dieser Phosphorglieder cis-Chelate. Die Strukturen von 6 und des PdC12-Komplexes 8 wurden röntgenographisch bestimmt und ermöglichen eingehende Strukturvergleiche. Insgesamt ergibt sich bei aller Cyclophosphazen-Ähnlichkeit ein phosphidischer Charakter des zweifach-koordinierten Phosphors in 6. Eine MNDO-Berechnung bestätigt das ebenfalls. An N/P-Analogue of Cyclotetraphosphazene: Reactions and Structure of Octaphenyl-1,5,2λ5,3, 4λ5,6λ5,7,8λ5-diazahexaphosphocin and its PdCl2-Complex The eight-membered heterocycle 6 indicated in the title is analogous to the octaphenyl cyclotetraphosphazene in which two antipodal nitrogen ring members have been replaced by two-coordinate phosphorus. It can be obtained from (Ph2P)2NLi and P4. Very strong nucleophiles attack the PP-bonds and eventually degrade the ring in a way reverting the synthesis. 6 is selectively methylated at the two-coordinate phosphorus and forms cis-chelates with PdCl2 and PtCl2 by coordinating both of these phosphorus members. The structur of 6 and its PdC12-complex 8 were investigated by X-ray analysis and allowes multiple comparisons. All in all 6 certainly resembles a cyclophosphazene, its two-coordinate phosphorus displays phosphide character however. This is also confirmed by an MNDO calculation." @default.
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- W1989737269 date "1989-01-01" @default.
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- W1989737269 title "Ein N/P-Analogon des Cyclotetraphosphazens: Reaktionen und Struktur des Octaphenyl-1,5,2?5,3,4?5,6?5,7,8?5-diazahexaphosphocins und seines PdCl2-Komplexes" @default.
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- W1989737269 doi "https://doi.org/10.1002/zaac.19895790120" @default.
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