845869-75-2Relevant academic research and scientific papers
Azide addition to give a tetra-azazirconacycle complex
Heyduk, Alan F.,Blackmore, Karen J.,Ketterer, Nicole A.,Ziller, Joseph W.
, p. 468 - 470 (2005)
Addition of the dilithium salt, ortho-(Me3SiNLi) 2C6H4, to ZrCl4 affords a base-free, D2d-symmetric complex ZrIV[ortho-(Me3SiN) 2C6H4]2 (2), with rigorously planar ortho-phenylenediamine ligands. Lewis acidic 2 readily coordinates donor ligands such as NHEt2 to give the five-coordinate complex, Zr IV(NHEt2)[ortho-(Me3SiN)2C 6H4]2 (3), which is also accessible by the reaction of Zr(NEt2)4 with 2 equiv of ortho-(Me 3SiNH)2C6H4. Aryl azides react with 2 and 3 to give an unusual tetra-azametallacycle complex, 4, via 1,2-addition of a ligand N-Si bond to the organic azide. An X-ray crystal structure of 4 reveals a planar, five-membered metallacycle comprising the zirconium atom, one nitrogen atom of the ortho-(Me3SiN)2C6H 4 ligand, and all three nitrogen atoms of the aryl azide.
