Tumer, Yasemin2024-09-292024-09-2920220009-45362192-6549https://doi.org/10.1002/jccs.202200415https://hdl.handle.net/20.500.14619/3700In this study, trispirophosphazenes containing biphenyl-2,2 '-dioxy and ferrocenyldiamino groups were synthesized to investigate their stereogenic and structural properties. For this purpose, monospiro (1) and trans/cis-dispiro (2 and 3) cyclotriphosphazenes were obtained from the reactions of hexachlorocyclotriphosphazatriene (N3P3Cl6; trimer; HCCP) with N-ethyl-N '-ferrocenylmethyl-ethylenediamine. Subsequently, bis(biphenyl-2,2 '-dioxy)-substituted ferrocenylphosphazene (4) was prepared from the reaction of an equimolar amount of monoferroceylphosphazene (1) with two equimolar amounts of dipotassium biphenyl-2,2 '-dioxide. Reactions of equimolar amounts of 2 and 3 with equimolar amounts of dipotassium biphenyl-2,2 '-dioxide yielded trans-(5) and cis-(6) trispirophosphazenes, respectively. Characterizations of all trispiro compounds were made using H-1, C-13, and P-31 NMR spectra. In addition, trispirophosphazenes 5 and 6 have two equivalent stereogenic P-centers. Trans-5 and cis-6 are expected to exist in racemate and meso forms. The molecular and crystal structures of the two phosphazenes (4 and 5) were clarified by single-crystal X-ray crystallography. Also, since the absolute configuration of one enantiomer of 5 is found to be RR, the other must be SS.eninfo:eu-repo/semantics/closedAccessspectroscopytrispirocyclotriphosphazenesX-ray crystallographyArticle10.1002/jccs.2022004152-s2.0-85140059369190711Q3189769WOS:000869604400001Q3