Tris 3-phenyl-l-pyrazolyl methane

Fernandez-Baeza, F. A. Jalon, A. Otero, and Ma. E. Rodrigo-Bianco, J. Chem. Soc., Dalton Trans., 1015 (1995). 

In this context it is worth noting that bis(pyrazolyl)methanes are isosteric with the bis(oxazolyl)methanes, which have been successfully exploited in asymmetric catalysis.15 

Submitted by DANIEL L. REGER, JAMES E. COLLINS, DONALD L. JAMESON, and RONALD K. CASTELLANO1 Checked by ALLAN J. CANTY1 and HONG JIN  

The tris(N-(3-tm-butyl)pyrazolyl)methane ligand, with an extremely bulky 3-substituent, favors the formation of tetrahedral complexes2 in much the same way as observed in the chemistry of the hydrotris(3-tert-butyl-pyrazolyl)borate ligand.1 

Submitted by THOMAS N. SORRELL and WILLIAM E. ALLEN Checked by GERARD PARKIN and CLARE KIMBLIN  

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