Synthesis and chemistry of the bis(trimethylsilyl)amido bis-tetrahydrofuranates of the group 2 metals magnesium, calcium, strontium and barium. X-ray crystal structures of Mg[N(SiMe3)2]2·2THF and related Mn[N(SiMe3)2]2·2THF

Synthesis and Characterization of Strontium Bis(N-isopropylanilide) and Comparison with the Lighter Magnesium and Calcium Congeners

“…The molecular structure and numbering scheme of were also observed for [(thf) 2 Mg{N(SiMe 3 ) 2 } 2 ] with bulky bis(trimethylsilyl)amide ions [13].…”

“…This dependency has already been demonstrated for the alkali metal hydrides, methanides, cyclopentadienides, amides, fluorides, and hydroxides, and a similar relationship is true for the alkaline earth metal derivatives as was demonstrated for the alkaline earth metal bis(methanides). For such ionic molecules it can be envisioned that the influence of the neutral coligand and of the coordination number of the metal on the chemical 1 H (Table 1) and 13 C NMR shifts (Table 2) is negligible. …”

“…These complexes were prepared via transmetalation from M[N(SiMe 3 ) 2 ] 2 with M = Hg [13], Sn [14,15]. Deprotonation of bis(trimethylsilyl)amine with pyrophoric strontium in tetrahydrofuran (THF) yielded [(thf) 2 Sr{N(SiMe 3 ) 2 } 2 ] which gave polymeric [(diox)Sr{N(SiMe 3 ) 2 } 2 ] ∞ after exchange of both thf ligands by one 1,4-dioxane molecule (diox) [16].…”

A Well‐Defined Hydrocarbon‐Soluble Calcium Monofluoride, [{LCaF(thf)}2]: The Application of Soluble Calcium Derivatives for Surface Coating

“…30 %) was purchased from Aldrich and used as such. Compounds 1, [9] Me 3 SnF, [10] 3, [16] 4, [9,17] and 5 [12] were prepared according to literature methods. The instrumental methods employed have been described elsewhere.…”

Arylcalcium‐Verbindungen: Synthesen, Strukturen, physikalische Eigenschaften und chemisches Verhalten

“…[9,25] Im Gegensatz zu den schweren Erdalkalimetallen selbst sind ihre Verbindungen hoch reaktiv und gehen oft Etherspaltungen ein. [26,27] Zur Vermeidung dieser Zersetzungsreaktionen sind sowohl die Abschirmung der reaktiven Ca-CBindung als auch die Handhabung der Organocalcium-Verbindungen bei tiefen Temperaturen vorteilhaft. Eine weitere Hürde ist, dass die organischen Verbindungen der schweren Erdalkalimetalle ionisch und damit in gängigen organischen Lösungsmitteln oft schwerlöslich sind.…”