Bauer, Heiko published the artcileChromocene, ferrocene, cobaltocene, and nickelocene derivatives with isopropyl and methyl or trimethylsilyl substituents, Application of Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of Organometallic Chemistry (2016), 63-73, database is CAplus.
From sodium 2,3-diisopropyl-1,4-dimethyl-cyclopentadienide and MBr2(dme) (M = Fe, Co, Ni) the corresponding ferrocene (1), cobaltocene (2) and nickelocene (3) could be obtained as pure, crystalline solids. From an analogous reaction of sodium 2,3,5-triisopropyl-1,4-dimethyl-cyclopentadienide with FeCl2, only the mixed-substituted ferrocene (32Cp)(22Cp)Fe (4) could be crystallized (32Cp = 2,3,5-triisopropyl-1,4-dimethyl-cyclopentadienyl, 22Cp = 2,3-diisopropyl-1,4-dimethyl-cyclopentadienyl). The trimethylsilyl substituted ferrocene (5) and nickelocene (6) were synthesized from the corresponding metal halides and potassium 2,3-diisopropyl-1,4-dimethyl-5-trimethylsilyl-cyclopentadienide as well as a series of chromocenes with silylated or alkylated cyclopentadienyl ligands (7–10) from chromium(II) acetate. Octaisopropylnickelocene (11) has been obtained and converted to octaisopropylnickelocenium hexafluorophosphate (12). 1,2,3,4-Tetraisopropylnickelocenium tetrabromoaluminate (13) was obtained from tetraisopropylcyclopentadienylnickel(II) tetrabromoaluminate and nickelocene. Crystal structures have been obtained for metallocenes 1–5, 7–9, and 11.
Journal of Organometallic Chemistry published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Application of Cobalt(II) dibromo(1,2-dimethoxyethane).
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary