Synthese und Struktur von CpAlCl₂‐Verbindungen mit sterisch anspruchsvollen Substituenten (Cp = Me₅C₅, EtMe₄C₅)

Abstract

Synthesis and Structure of CpAlCl2 Compounds with Sterically Demanding Substituents (Cp = Me5C5, EtMe4C5)[1] The compounds Cp*AlCl2 (3) (Cp* = Me5C5) and Cp′AlCl2 (4) (Cp′ = EtMe4C5) have been prepared by the reaction of Cp*SiMe3 (1) and Cp′SiMe3 (2) with AlCl3. The single‐crystal X‐ray structures of 3 and 4 are reported.

Sodium–Potassium Alloy for the Reduction of Monoalkyl Aluminum(III) Compounds

“…The starting materials Me SnCl, Me AlCl, CycMe SiCl, Br , I , and KF were purchased from Aldrich. Me SnF (11), (Tris) Si (12), (Me Si) CHLi (13), and (Cp*AlCl ) (14) were prepared according to the literature methods. Aromatic, hydrocarbon, and etherated solvents were dried over Na/K alloy and vacuum transferred to the reaction #asks prior to use.…”

“…Monochromated MoK radiation ( "0.71073 A s ) was used. Semiempirical absorption correction using psi-scans (7,8,14, and 15) or using equivalents (2, 6, and 16) were employed. The structures were solved by direct methods (15a).…”

“…(1) was prepared from Cp*SiMe and AlCl (14). We followed the same strategy (Scheme 1) for the synthesis of [Cp*AlBr( -Br)]…”

[(η5‐C5Me5)AlFe(CO)4]—Synthesis, Structure, and Bonding

“…At this temperature, a solution of [(Cp*AICl,},] (466 mg, 2 mmol) [5] in toluene (25 mL) at -78°C was quickly added in one portion with vigorous stirring. The reaction mixture was allowed to warm up to room temperature and stirred for 2 h, filtered, and the filtrate concentrated to about 20 mL, over which n-pentane (10 mL) was layered.…”

A Pyridine‐Stabilized Alumoxane Containing Two 1,3,2‐Diazaalumina[3]ferrocenophane Units

“…Apparently, a very specific source of hydrolysis is required to produce 6 . When we studied the reaction of N , N ′‐dilithium derivative 2 with Cp*AlCl 2 ,15 we obtained chloride 5a 11,12 instead of the expected 1,3‐diaza‐2‐alumina[3]ferrocenophane with an Al‐Cp* functionality. Together with chloride 5a , the reaction solution contained 1 and 6 .…”