Ding, Yi; Ruth, Paul Niklas; Herbst-Irmer, Regine; Stalke, Dietmar; Yang, Zhi; Roesky, Herbert W. published an article in 2021. The article was titled 《Pentamethyl- and 1,2,4-tri(tert-butyl)cyclopentadienyl containing p-block complexes – differences and similarities》, and you may find the article in Dalton Transactions.Category: bromides-buliding-blocks The information in the text is summarized as follows:
The sterically encumbered cyclopentadienyl ligand 1,2,4-(Me3C)3C5H2 (Cp”’) was used to stabilize efficiently the main group metals of Al, Ga, In, Ge and Sn, resp. The σ-bonded Ga compounds [η1-Cp”’Ga(μ-X)X]2 (X = Cl, 2; X = I, 3) and In compound [η1-Cp”’In(μ-Br)Bu]2 (7) exhibit dimers through halogen bridges. Reduction of 2 with 2 equiv of KC8 leads almost to the same amount of η1-Cp”’Ga(THF)Cl2 (4) and η5-Cp”’Ga (5), resp. The exception is compound 5, which was obtained by reducing 2 or 3 with 4 equiv of KC8. Compound 5 as Lewis base reacts with GaI3 readily forming the Lewis acid-base adduct product η5-Cp”’Ga → GaI3 (6). Also, compounds with the Cp”’ ligand stabilize heavier low-valent Group 14 elements for example [η5-Cp”’E(II)]+ [E(II)Cl3]- (E = Ge 8, Sn 9), which are π-bonded ionic compounds that possess a low-valent cation and an anion. In the cation of [η5-Cp”’E(II)]+, the Cp”’ ligand adopts an η5-coordination mode with Ge and Sn, resp., which present half-sandwich complexes. While the E(II) fragment interacts with five π electrons from the Cp”’ unit to generate an electron-octet arrangement at the resp. element. All new reported structures are comparing well with the corresponding compounds containing the pentamethylcyclopentadienyl (Cp*) ligand. The experimental process involved the reaction of Indium(III) bromide(cas: 13465-09-3Category: bromides-buliding-blocks)
Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.Category: bromides-buliding-blocks
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary