Bis(allyl)calcium is surprisingly stable and has good solubility in THF. The compound crystallizes as a triglyme adduct (see picture; C gray, O red). Selective CC coupling to give 1,5‐hexadiene is observed upon reaction with iodine.

[ZnCl(2)(3,4,5-trichloropyridine)(2)] features short intermolecular Cl···Cl contacts between halogen atoms of different nature, and a charge density study provides experimental evidence for the accepted model of the halogen bonds: an arene-bonded Cl atom acts as a donor of electron density towards the "sigma hole" of a chlorido ligand attached to a neighbouring Zn(II) cation.

Bis(allyl)calcium ist erstaunlich beständig und in THF gut löslich. Die Verbindung kristallisiert als Triglyme‐Addukt (siehe Bild; C grau, O rot). Die Umsetzung mit Iod ergibt unter selektiver C‐C‐Kupplung 1,5‐Hexadien.

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