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. 2020 May 19;56(40):5397-5400.
doi: 10.1039/d0cc01104e.

Photochemical synthesis of a zirconium cyclobutadienyl complex

P Minh N Đ  1 , Novruz G Akhmedov  1 , Jeffrey L Petersen  1 , Brian S Dolinar  1 , Carsten Milsmann  1
Affiliations

Photochemical synthesis of a zirconium cyclobutadienyl complex

P Minh N Đ et al. Chem Commun (Camb). .

Abstract

Photolysis of (MePMPMe)2ZrBn2 (MePMPMe = 3,5-dimethyl-2-(2-pyridyl)pyrrolide) in the presence of diphenylacetylene yields the first η4-cyclobutadienyl zirconium complex, (MePMPMe)2Zr(η4-C4Ph4), through formal [2+2] cycloaddition of two alkynes at a putative low-valent zirconium intermediate. This unique reactivity expands the scope of alkyne coupling reactions at low-valent zirconium centers that traditionally produce zirconacyclopentadienes.

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