Abstract: | The title compound [Nd(OSiMe3)3]4 ( 1 ) was prepared by reaction of [Nd{N(SiMe3)2}3] with Me3SiOH in toluene at room temperature. Compound 1 crystallized from a concentrated toluene solution in the monoclinic space group P21/n with the lattice constants a = 15.144(1) Å, b = 25.142(1) Å, c = 20.391(1) Å and β = 103.755(2)°. In the solid state a tetramer is observed which shows Nd‐O bond distances in the range 2.129(2)‐2.675(2) Å. |