Ali, Safaa H.;Shephard, Angus C. G.;Wang, Jun;Guo, Zhifang;Davies, Murray S.;Deacon, Glen B.;Junk, Peter C. published 《Lanthanoid Biphenolates as a Rich Source of Lanthanoid-Main Group Heterobimetallic Complexes》 in 2022. The article was appeared in 《Chemistry – An Asian Journal》. They have made some progress in their research.Quality Control of 2,2-Methylenebis(6-tert-butyl-p-cresol) The article mentions the following:
Several new trivalent dinuclear rare earth 2,2′-methylenebis(6-tert-butyl-4-methylphenolate) (mbmp2-) complexes with the general form [Ln2(mbmp)3(thf)n] (Ln=Sm (1), Tb (2) (n=3), and Ho (3), Yb (4) (n=2)), and a tetravalent cerium complex [Ce(mbmp)2(thf)2] (5) have been synthesized by RTP (redox transmetallation/protolysis) reactions from lanthanoid metals, Hg(C6F5)2 and the biphenol mbmpH2. These new complexes and some previously reported partially protonated rare earth biphenolate complexes [Ln(mbmp)(mbmpH)(thf)n] react with lithium, aluminum, potassium and zinc organometallic reagents to form lanthanoid-main group heterobimetallic species. When reaction mixtures containing the Ln biphenolate complexes were treated with n-butyllithium, both mol. [Li(thf)2Ln(mbmp)2(thf)n] (Ln=La (6), Pr (7) (n=2) and Er (8), Yb (9), and Lu (10) (n=1)) and charge separated [Li(thf)4][Ln(mbmp)2(thf)2] (Ln=Y (11), Sm (12), Dy (13), and Ho (14)) complexes were isolated. Treatment with trimethylaluminium also led to isolation of mol. ([AlMe2Ln(mbmp)2(thf)2] (Ln=Pr (15), Sm (16), and Tb (17))) and ionic [La(mbmp)(thf)5][AlMe2(mbmp)] (18) complexes. One gadolinium-potassium ([K(thf)3Gd(mbmp)2(thf)2] (19)), and one ytterbium-zinc species ([ZnEtYb(mbmp)2(thf)] (20)) were isolated from treatment of reaction mixtures with potassium bis(trimethylsilyl)amide and diethylzinc resp. To complete the study, the researchers used 2,2-Methylenebis(6-tert-butyl-p-cresol) (cas: 119-47-1) .
Quality Control of 2,2-Methylenebis(6-tert-butyl-p-cresol)2,2′-Methylenebis(4-methyl-6-tert-butylphenol)(CAS: 119-47-1) is a natural product found in Streptomyces and Aspergillus fumigatus .
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