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Niobium η-cyclopentadienyl compounds with imido and amido ligands derived from tert-butylamine

Lookup NU author(s): Professor Mike Green, Dr Mark Elsegood, Emeritus Professor Bill Clegg

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Abstract

The niobium eta -cyclopentadienyl compounds with imido and amido ligands [Nb(eta -C5H5)((NBu)-Bu-t)((NHBu)-Bu-t)Cl] 1,* [Nb(eta -C5H5)((NBu)-Bu-t)((NHBu)-Bu-t)Bu-n] 2, [Nb(eta -C5H5)((NBu)-Bu-t)((NHBu)-Bu-t)(2)] 3, [Nb(eta -C5H5)((NBu)-Bu-t)((NHBu)-Bu-t)Me] 4, [Nb(eta -C5H5)(eta (1)-C5H5)((NBu)-Bu-t)((NHBu)-Bu-t)] 5, [Nb{(eta -C5H4)CMe2(eta (1)-C5H4)}((NBu)-Bu-t)((NHBu)-Bu-t)] 6, [Nb(eta -C5H5){N((C6H3Pr2)-Pr-i-2,6)}((NHBu)-Bu-t)Cl] 7,* [Nb(eta -C5H5){N((C6H3Pr2)-Pr-i-2,6)}((NHBu)-Bu-t)Me] 8, [Nb(eta -C5H5)((NBu)-Bu-t)(NEt2)Cl] 9 and [Nb(eta -C5H5)((NBu)-Bu-t)((NHBu)-Bu-t)(NEt2)] 10 have been prepared (* indicates the crystal structure has been determined). A correlation between the chemical shift of the NH proton and the value of Delta delta measured between the alpha and beta carbons of the tert-butyl groups of the amido ligands is discussed in relation to the degree of electron donation from the amido ligand to the niobium centre.


Publication metadata

Author(s): Humphries MJ, Green MLH, Leech MA, Gibson VC, Jolly M, Williams DN, Elsegood MRJ, Clegg W

Publication type: Article

Publication status: Published

Journal: Journal of the Chemical Society - Dalton Transactions

Year: 2000

Issue: 22

Pages: 4044-4051

Print publication date: 01/01/2000

ISSN (print): 1472-7773

ISSN (electronic): 1364-5447

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/b006333i

DOI: 10.1039/b006333i


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