Synthesis and characterization of the first example of a metallacarborane that incorporates an alkaline-earth metal: the molecular structure of closo-1,1,1,1-(MeCN)4-1,2,4-CaC2B10H12

1990 ◽  
Vol 112 (12) ◽  
pp. 4962-4963 ◽  
Author(s):  
Rajesh Khattar ◽  
Carolyn B. Knobler ◽  
M. Frederick Hawthorne
Keyword(s):  
Molecular Structure ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Synthesis And Characterization ◽  
Alkaline Earth Metal

Synthesis and characterization of alkaline earth metal trichloroacetates

2014 ◽  
Vol 419 ◽  
pp. 13-18 ◽  
Author(s):  
Sukhjinder Singh ◽  
Deepika Saini ◽  
Ghazalpreet Kaur ◽  
S.K. Mehta ◽  
Ravneet Kaur ◽  
...  
Keyword(s):  
Alkaline Earth ◽  
Earth Metal ◽  
Synthesis And Characterization ◽  
Alkaline Earth Metal

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

2013 ◽  
Vol 68 (5-6) ◽  
pp. 518-532 ◽  
Author(s):  
Claas Loh ◽  
Carsten Glock ◽  
Steffen Ziemann ◽  
Helmar Görls ◽  
Sven Krieck ◽  
...  
Keyword(s):  
Ligand Exchange ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Synthesis And Characterization ◽  
Alkaline Earth Metal ◽  
Similar Reaction ◽  
Exchange Reactions ◽  
Metathesis Reaction ◽  
Short Contacts

The metathesis reaction of strontium diiodide [(thf)5SrI2] with K[N(Ph)iPr] in THF yields [(thf)4Sr{N(Ph)iPr}2] (1). Ligand exchange reactions with 1,2-dimethoxyethane (DME), tetramethylethylenediamine (TMEDA), and pentamethyldiethylenetriamine (PMDETA) allow the isolation of the corresponding adducts [(dme)2Sr{N(Ph)iPr}2] (2), [(tmeda)(thf)Sr{N(Ph)iPr}2] (3) and [(pmdeta)Sr{N(Ph)iPr}2] (4), respectively. Magnesiation of N-isopropylaniline with dibutylmagnesium in THF leads to the formation of [(thf)2Mg{N(Ph)iPr}2] (5). A similar reaction in TMEDA gives nearly insoluble crystalline [(tmeda)Mg{N(Ph)iPr}2] (7), whereas the mother liquor contains heteroleptic [(tmeda)(nBu)Mg{N(Ph)iPr}] (6). Magnesiation of N-isopropylaniline in 2,2,5,5-tetramethyltetrahydrofuran (Me4thf) yields [(Me4thf)Mg{N(Ph)iPr}2] (8) with a threecoordinate metal center. In hydrocarbons this complex loses the bulky ether base, and the solvent-free dimer [Mg{N(Ph)iPr}2]2 (9) can be isolated. Reaction of this complex with 1,2- dimethoxyethane or metalation of N-isopropylaniline with dibutylmagnesium in DME yield the dme adduct, [(dme)Mg{N(Ph)iPr}2] (10). The crystal structures show that the nitrogen atoms of the magnesium-bound N-isopropylanilide ions are in planar environments whereas strontium-bound N-isopropylanilide ions show rather short contacts between the alkaline earth metal and the ipsocarbon atoms of the phenyl groups leading to a pyramidalization of the coordination of the nitrogen atoms

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