385828-43-3

Basic information

• Product Name: [(C₅Me₄SiMe₃)2La][BPh₄]
• CAS NO: 385828-43-3
• Molecular Weight: 844.908
• Mol File: 385828-43-3.mol

Chemical Properties

• CAS DataBase Reference: [(C₅Me₄SiMe₃)2La][BPh₄](CAS DataBase Reference)
• NIST Chemistry Reference: [(C₅Me₄SiMe₃)2La][BPh₄](385828-43-3)
• EPA Substance Registry System: [(C₅Me₄SiMe₃)2La][BPh₄](385828-43-3)

Safety Data

• Hazardous Substances Data: 385828-43-3(Hazardous Substances Data)

Upstream product

• 385828-37-5 (C₅Me₄SiMe₃)2La(allyl) 

Relevant articles and documents

Synthesis and structure of tris(alkyl- and silyl-tetramethylcyclopentadienyl) complexes of lanthanum

In efforts to make sterically crowded tris(peralkylcyclopentadienyl) complexes of lanthanum for the exploration of sterically induced reduction chemistry with a diamagnetic system, the synthesis of (C5Me4R)3La complexes has been pursued with R = Me, Et, iPr, and SiMe3. The complexes were synthesized in four steps: reaction of LaCl3 with KC5Me4R to form (C5Me4R)2LaCl2K(THF)2, addition of allylmagnesium chloride to make (C5Me4R)2-La(C3H5), protonolysis with Et3NHBPh4 to make [(C5Me4R)2La][BPh4], and finally the replacement of BPh4- with C5Me4R- using KC5Me4R to make (C5Me4R)3La. X-ray crystallographic data were obtainable on the (C5Me4R)3La complexes for R = Me, Et, iPr, and SiMe3. In each complex, the three C5Me4R ring centroids define a trigonal planar geometry around La. The average La-(ring centroid) distances are 2.64, 2.65, 2.66, and 2.69 A for the Me, Et, iPr, and SiMe3 structures, respectively, with La-C distances ranging from 2.857 (3) to 3.029 (2) A. Despite the steric crowding, ligand exchange can be observed by NMR spectroscopy.