Calcium cyclopentadienyl compounds

Manganese cyclopentadienyl tricarbonyl (as Mn) Marble/calcium carbonate Mercury (alkyl compounds) (as Hg)... 

Calcium, Strontium, and Barium,57 The organic compounds of these metals are of little synthetic use compared to the magnesium compounds. The most interesting and best studied are the cyclopentadienyls and related compounds.58 These can be... 

Recently some papers have appeared which deal with the related structures of the heavier alkali earth metal organometallic compounds. Cyclopentadienyl derivatives of calcium, strontium, and barium proved to possess sufficient stability to permit their synthesis and subsequent crystallization. These results are briefly included in this review (see Table 111). 

The dicyclopentadienyl derivatives of these elements which are known at the present time (those of magnesium and calcium) are in many respects similar to those of the alkali metals, being colorless, saltlike compounds. The magnesium compound was successfully prepared by the interaction of sodium cyclopentadienyl and magnesium bromide in tetra-hydrofuran 214), by thermal decomposition of cyclopentadienyl magnesium bromide 214) and, recently, by the action of cyclopentadiene... 

T.P. Hanusa (2000) Coordination Chemistry Reviews, vol. 210, p. 329 - Non-cyclopentadienyl organometallic compounds of calcium, strontium and barium . 

Calcium, strontium, and barium. Very little is known about the organic compounds of these metals. The only properly characterized derivatives are the evidently ionic cyclopentadienyls (C5Hs)2M, the complex ethyls M(AlEt4)2 (M = Ca, Sr, Ba) and the red complex Ph3CCaQ(THF)2 (from calcium amalgam and PhsCQ in THF). Some alkylcalcium halides have also been obtained in solution in ether and in THF. 

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