Insertion reactions into the .sigma.-yttrium-carbon bond. Molecular structure of the permethylyttrocene iminoacyl tetrahydrofuranate (.eta.5-C5Me5)2Y[.eta.2-C[CH2(3,5-Me2C6H3)]:N(2,6-Me2C6H3)].C4D8O

Autor:	Jan H. Teuben, Klaas H. den Haan, Gerrit A. Luinstra, Auke Meetsma
Přispěvatelé:	Stratingh Institute of Chemistry
Rok vydání:	1987
Předmět:	Ligand Stereochemistry Organic Chemistry Nuclear magnetic resonance spectroscopy Crystal structure Medicinal chemistry Adduct Inorganic Chemistry Bond length chemistry.chemical_compound chemistry Pivalonitrile Physical and Theoretical Chemistry Metallocene Monoclinic crystal system
Zdroj:	Organometallics, 6(7), 1509-1515. AMER CHEMICAL SOC INC
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om00150a024
Popis:	The reactions of Cp*2YCH(SiMe3)2 (1) (Cp* = η5-C5Me5) with CO2, t-BuCN, and t-BuNC give the monomeric complexes Cp*2Y(η2-O2CCH(SiMe3)2) (3), Cp*2YN=C(t-Bu)CH(SiMe3)2·NC-t-Bu (4), and Cp*2YCH(SiMe3)2·CN-t-Bu (5), respectively. With CS2 and (2,6-xylyl)NC no reaction is observed. The permethylyttrocene benzyl Cp*2YDMB (2) (DMB = 3,5-dimethylbenzyl) reacts with the substrates mentioned before and gives Cp*2Y(η2-O2C(DMB)) (6), Cp*2Y(η2-S2C(DMB)) (7), Cp*2YN=C(DMB)-t-Bu·NC-t-Bu (8), Cp*2Y(η2-C(DMB)=N-t-Bu)·CN-t-Bu (9), and Cp*2Y(η2-C(DMB)=N(2,6-xylyl)) (10) (xylyl = dimethylphenyl). The iminoacyl 10 reacts with THF to give the adduct Cp*2Y(η2-C(DMB)=N(2,6-xylyl))·THF (11). The crystal structure of 11 was determined by X-ray diffraction. The crystals of 11 are monoclinic, space group P21/c, with a = 10.937 (6) A, b = 18.367 (8) A, c = 18.04 (2) A, β = 104.58 (6)°, and Z = 4. The structure was refined to R = 0.032. The molecular structure of 11 clearly shows the η2-coordination of the iminoacyl ligand with an Y-N distance of 2.407 (3) A, and an Y-C bond length of 2.392 (3) A.
Databáze:	OpenAIRE
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