ISSN:
0009-2940
Keywords:
Azaferrocene, tetramethyl-
;
Trihydropyrrolylboranate coordination
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Heterocycles as Ligands, V. - Synthesis and Characterization of 2,3,4,5-Tetramethyl-l-azaferroceneC5H5Fe(C4Me4N) (7) is obtained by deprotonation of the pyrrole complex [C5H5Fe(C4Me4NH)]BF4 (6). The nitrogen basicity of 7 resembles closely that of alkylpyridines (pKa = 7.2). Complex 7 reacts with Lewis acids to give the adducts [C5H5Fe(C4Me4NR)]+ [8, 9; R = CH3, C(O)CH3] and C5H5Fe(C4Me4NE) [10, 11; E = BH3, Fe(CO)4]. The X-ray structure of the pyrrolyltrihydroborate complex 10 is isosteric with pentamethylferrocene and has a metallocene structure with an eclipsed ligand conformation.
Notes:
Die Synthese von C5H5Fe(C4Me4N) (7) gelingt durch Deprotonierung des Pyrrol-Komplexes [C5H5Fe(C4Me4NH)]BF4 (6). Komplex 7 entspricht in seiner Stickstoff-Basizität den Alkylpyridinen (pKs = 7.2). Durch Umsetzung mit Lewis-Säuren werden die Addukte [C5H5Fe(C4Me4NR)]+ [8, 9; R = CH3, C(O)CH3] und C5H5Fe(C4Me4NE) [10, 11; E = BH3, Fe(CO)4] erhalten. Nach der Kristallstrukturanalyse ist der zu Pentamethylferrocen isostere Pyrrolyltrihydroborat-Komplex 10 ein Metallocen mit ekliptisch angeordneten Ringliganden.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19891221010
