Cyclopentadiene with two coordinating sites: 1,5-bis(diphenylphosphino) -2,3,4-trimethylcyclopenta-1,3-diene

Non-degenerate 1,2-silyl shift in silyl substituted alkyltrimethylcyclopentadienes

“…Synthesis of silyl substituted alkyltrimethylcyclopentadienes 1-Alkyl-2,3,4-trimethylcyclopentadienes (mixture of isomers, where alkyl = i-Pr (1), s-Bu (2), cyclohexyl (3), t-Bu (4)) were prepared by the reaction of appropriate alkyl Grignard (or lithium) reagent with a mixture of 2,3,4-trimethylcyclopent-2-en-1-one and 3,4,5-trimethylcyclopent-2-en-1-one [20], followed by hydrolysis, and an iodine catalyzed dehydration. The cyclopentadienes were obtained in rather low yields (36-47%), presumably due to a steric hindrance of secondary or tertiary alkyl group.…”

Synthesis and Complexation of the Metalloligand {(η5-C5H5)[η5-C5Me3-1,2-(PPh2)2]TiCl2} (TiPHOS): The First Example of a 1,2-Bis(diphenylphosphanyl)titanocene Derivative

“…The ligand 1 was prepared according to an earlier method involving the synthesis of 1,2,3‐trimethylcyclopenta‐1,3‐diene, followed by two repeated sequences of deprotonation‐addition to PPh 2 Cl and then deprotonation 6…”

Properties of metallocene complexes during the oxidative crosslinking of air drying coatings

“…The commercial Co drier (Octa-Soligen Kobalt 10 in D 60) was obtained from Borchers GmbH. Ferrocene (Fe0) and its derivatives (1,1 0 -dimethylferrocene (Fe1); 1; 1 0 ; 2; 2 0 ; 3; 3 0 -hexamethylferrocene (Fe3); 1; 1 0 ; 2; 2 0 ; 3; 3 0 ; 4; 4 0 -oktamethylferrocene (Fe4); dekamethylferrocene (Fe5); acetylferrocene (AcFe); 1; 1 0 -dibenzoylferrocene (DBFe) and 1; 1 0 -dikarbomethoxyferrocene (KarbFe)) were synthesised by methods described earlier [6][7][8][9]. The alkyd resin (ChS-Alkyd L 652 W 60) for monitoring of hardness development and other film properties was supplied by Spolchemie a.s.…”