Organolanthanide tetrahydroborates. Ligation geometry and coordinative saturation

Tobin J Marks, Gregory W. Grynkewich

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Abstract

This work reports the synthesis and spectral (infrared, Raman) characterization of the series of compounds (η5-C5H5)2LnBH 4·THF, where Ln = Sm, Er, Yb. Vibrational spectra indicate that the mode of BH4- coordination is sensitive to the metal ionic radius. The Ln = Sm compound is proposed to have tridentate BH4- ligation, whereas the Ln = Yb compound is proposed to have bidentate ligation. The tetrahydrofuran can be removed for Ln = Yb and Er to yield complexes of the composition (η5-C5H5)2LnBH4. Vibrational spectra are similar to those of Be(BH4)2 and CH3Zn(BH4), suggesting a polymeric structure with bridging BH4- groups. All data suggest appreciable ionic character in the bonding of the tetrahydroborate ligand to the trivalent lanthanides.

Original languageEnglish
Pages (from-to)1302-1307
Number of pages6
JournalInorganic Chemistry
Volume15
Issue number6
Publication statusPublished - 1976

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ASJC Scopus subject areas

  • Inorganic Chemistry

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