Synthesis, Structure, and Properties of a Dimeric Chromium(II) Pyrazolato Complex with a Long Chromium−Chromium Distance. Maintenance of a Dimeric Structure in Solution and Interconversion between Dimeric and Monomeric Structures

The synthesis, solid-state structure, and solution structure of Cr2(tBu2pz)4 are described. This complex is obtained by sublimation of the monomeric species Cr(tBu2pz)2(4-tBupy)2 and contains long chromium−chromium distances that are enforced by the divergent nature of the pyrazolato ligands.本文详述了配合物Cr₂(tBu₂pz)₄（其中tBu为叔丁基（tert-butyl），pz为吡唑基（pyrazolyl））的合成方法、固态结构与溶液态结构。该配合物可通过单体物种Cr(tBu₂pz)₂(4-tBupy)₂（其中4-tBupy为4-叔丁基吡啶（4-tert-butylpyridine））的升华反应制备得到，其铬-铬间距较长，该结构特征由吡唑根配体的发散配位特性所决定。