The synthesis and structure of the alkaline earth metal organic compounds [M(OAr)2(thf)n][M = Ca, n= 3 (1) or 0; M = Ba, n= 4] and [{Ca(NR2)(µNR2)(thf)}2], and the X-ray structure of (1)(Ar = C6H2But2-2,6-Me-4; R = SiMe3; thf - OC4H8)
- 1 January 1990
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 17,p. 1141-1142
- https://doi.org/10.1039/c39900001141
Abstract
Treatment of highly reactive, pyrophoric calcium or barium (obtained by co-condensation of the appropriate metal vapour and toluene) in tetrahydrofuran with (i) ArOH (Ca more reactive than Ba) affords the phenoxide [M(OAr)2(thf)n][M = Ca and n= 3 (1), or n= 0 after heating at 80°C and 10–2 Torr; M = Ba, n= 4], or (ii) R2NH (for M = Ca) yields [{Ca(NR2)(µ-NR2)(thf)}2][also obtained from (1)+ 2LiNR2 in n-C6H14; Ar = C6H2But 2-2,6-Me-4; R = SiMe3)]; the X-ray structure of crystalline (1) shows a distorted trigonal bipyramidal Ca environment with the thf ligands in apical sites.Keywords
This publication has 19 references indexed in Scilit:
- Molecular structures of alkaline earth-metal metallocenes: electron diffraction and ab initio investigationsOrganometallics, 1990
- Solid state structure of bis(pentamethylcyclopentadienyl)barium, (Me5C5)2Ba; the first X-ray crystal structure of an organobarium complexJournal of the Chemical Society, Chemical Communications, 1988
- Metal vapour synthesis of bis{1,3-bis(trimethylsilyl)cyclopentadienyl}-calcium, -strontium, and -barium compounds; X-ray structures of [M{η-C5H3-1,3-(SiMe3)2}2(thf)](M = Ca, Sr; thf = tetrahydrofuran)Journal of the Chemical Society, Chemical Communications, 1988
- Organometallic coordination complexes of the bis(pentamethylcyclopentadienyl)-alkaline earth compounds, (Me5C5)2MLn, where M IS Mg, Ca, Sr, OR Ba and Me5C5BeClJournal of Organometallic Chemistry, 1987
- Synthesis and thermal average gas phase molecular structures of bis(pentamethylcyclopentadienyl)-strontium and -barium; the first organo-strontium and -barium structuresJournal of the Chemical Society, Chemical Communications, 1987
- The Thermal Average Molecular Structures of Bis(pentamethylcyclopentadienyl)magnesium(II), -calcium(II) and -ytterbium(II) in the Gas Phase.Acta Chemica Scandinavica, 1987
- The molecular structures of bis(pentamethylcyclopentadienyl)-calcium and -ytterbium in the gas phase; two bent metallocenesJournal of Organometallic Chemistry, 1986
- Synthesis of zerovalent bis(η-arene) compounds of zirconium, hafnium, niobium, tantalum, and tungsten using the metal vapoursJ. Chem. Soc., Dalton Trans., 1981
- Unsaturated organometallic compounds of the main group elements. DicyclopentadienylcalciumJournal of Organometallic Chemistry, 1974
- Peraparation of an extremely active magnesium slurry for Grignard reagent preparations by metal atom-solvent cocondensationsJournal of Organometallic Chemistry, 1974