Tricyanidoferrates(-IV) and Ruthenates(-IV) with Non-Innocent Cyanido Ligands.

ABSTRACT: Exceptionally electron-rich, nearly trigonal-planar tricyanidometalate anions [Fe(CN)₃ ]^7- and [Ru(CN)₃ ]^7- were stabilized in LiSr₃ [Fe(CN)₃ ] and AE_3.5 [M(CN)₃ ] (AE=Sr, Ba; M=Fe, Ru). They are the first examples of group 8 elements with the oxidation state of -IV. Microcrystalline powders were obtained by a solid-state route, single crystals from alkali metal flux. While LiSr₃ [Fe(CN)₃ ] crystallizes in P6₃ /m, the polar space group P6₃ with three-fold cell volume for AE_3.5 [M(CN)₃ ] is confirmed by second harmonic generation. X-ray diffraction, IR and Raman spectroscopy reveal longer C-N distances (124-128 pm) and much lower stretchin

SUBMITTER: Jach F 

PROVIDER: S-EPMC8362014 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature