Synthesis and characterisation of stable anionic group 3a dichlorometallocene(III) complexes and the X-ray structure of [AsPh4][Nd{η-C5H3(SiMe3)2}2Cl2]

Abstract
A new class of group 3a organometallic compounds, containing the dichlorometallocene(III) anion [Ln(cp″)2Cl2] is reported, obtained most conveniently by Cl addition to [{Ln(cp″)2Cl}2][cp″=η-C5H3(SiMe3)2]; the X-ray structure of [AsPh4][Nd(cp″)2Cl2] shows Nd–Clav. 2.668(4)Å and Cl–Nd–Cl 99.3(1)°.

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