Zirconocene complexes bearing novel 3-dimethylamino-1,2-dihydropentalene derived ligand systems

Bao Hua Xu; Gerald Kehr; Roland Fröhlich; Elisa Nauha; Gerhard Erker

doi:10.1039/c0dt00515k

Zirconocene complexes bearing novel 3-dimethylamino-1,2-dihydropentalene derived ligand systems

Bao Hua Xu, Gerald Kehr, Roland Fröhlich, Elisa Nauha, Gerhard Erker^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Coupling of the N,N-dimethylacrylamides 6a-c with cyclopentadienide resulted in the formation of the substituted 3-dimethylamino-1,2- dihydropentalnenes 2a-c. Deprotonation followed by metallation with CpZrCl ₃·DME gave the substituted zirconocenes 12a-c. The reaction of 3-dimethylamino-1-methyl-dihydropentalene 2a with ZrCl₂(NMe ₂)₂·2THF resulted in a unique coupling between a pair of the aminodihydropentalene derivatives to yield an unsymmetrically bridged novel ansa-zirconocene framework (9a). Treatment of the 1,1-dimethyl-substituted substrate 2b with this Zr-amido reagent in contrast resulted in a clean deprotonation and formation of the unbridged bis(dimethylaminohydropentalenyl)ZrCl₂ complexes 10b. The compounds 2a, 9a, meso-10b, 12a and 12c were characterized by X-ray diffraction.

Original language	English
Pages (from-to)	9973-9981
Number of pages	9
Journal	Dalton Transactions
Volume	39
Issue number	41
DOIs	https://doi.org/10.1039/c0dt00515k
Publication status	Published - 7 Nov 2010
Externally published	Yes

Access to Document

10.1039/c0dt00515k

Cite this

@article{1aac0f1c7df34d2b9de5a68949ac05bd,

title = "Zirconocene complexes bearing novel 3-dimethylamino-1,2-dihydropentalene derived ligand systems",

abstract = "Coupling of the N,N-dimethylacrylamides 6a-c with cyclopentadienide resulted in the formation of the substituted 3-dimethylamino-1,2- dihydropentalnenes 2a-c. Deprotonation followed by metallation with CpZrCl 3·DME gave the substituted zirconocenes 12a-c. The reaction of 3-dimethylamino-1-methyl-dihydropentalene 2a with ZrCl2(NMe 2)2·2THF resulted in a unique coupling between a pair of the aminodihydropentalene derivatives to yield an unsymmetrically bridged novel ansa-zirconocene framework (9a). Treatment of the 1,1-dimethyl-substituted substrate 2b with this Zr-amido reagent in contrast resulted in a clean deprotonation and formation of the unbridged bis(dimethylaminohydropentalenyl)ZrCl2 complexes 10b. The compounds 2a, 9a, meso-10b, 12a and 12c were characterized by X-ray diffraction.",

author = "Xu, {Bao Hua} and Gerald Kehr and Roland Fr{\"o}hlich and Elisa Nauha and Gerhard Erker",

year = "2010",

month = nov,

day = "7",

doi = "10.1039/c0dt00515k",

language = "English",

volume = "39",

pages = "9973--9981",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "41",

}

TY - JOUR

T1 - Zirconocene complexes bearing novel 3-dimethylamino-1,2-dihydropentalene derived ligand systems

AU - Xu, Bao Hua

AU - Kehr, Gerald

AU - Fröhlich, Roland

AU - Nauha, Elisa

AU - Erker, Gerhard

PY - 2010/11/7

Y1 - 2010/11/7

N2 - Coupling of the N,N-dimethylacrylamides 6a-c with cyclopentadienide resulted in the formation of the substituted 3-dimethylamino-1,2- dihydropentalnenes 2a-c. Deprotonation followed by metallation with CpZrCl 3·DME gave the substituted zirconocenes 12a-c. The reaction of 3-dimethylamino-1-methyl-dihydropentalene 2a with ZrCl2(NMe 2)2·2THF resulted in a unique coupling between a pair of the aminodihydropentalene derivatives to yield an unsymmetrically bridged novel ansa-zirconocene framework (9a). Treatment of the 1,1-dimethyl-substituted substrate 2b with this Zr-amido reagent in contrast resulted in a clean deprotonation and formation of the unbridged bis(dimethylaminohydropentalenyl)ZrCl2 complexes 10b. The compounds 2a, 9a, meso-10b, 12a and 12c were characterized by X-ray diffraction.

AB - Coupling of the N,N-dimethylacrylamides 6a-c with cyclopentadienide resulted in the formation of the substituted 3-dimethylamino-1,2- dihydropentalnenes 2a-c. Deprotonation followed by metallation with CpZrCl 3·DME gave the substituted zirconocenes 12a-c. The reaction of 3-dimethylamino-1-methyl-dihydropentalene 2a with ZrCl2(NMe 2)2·2THF resulted in a unique coupling between a pair of the aminodihydropentalene derivatives to yield an unsymmetrically bridged novel ansa-zirconocene framework (9a). Treatment of the 1,1-dimethyl-substituted substrate 2b with this Zr-amido reagent in contrast resulted in a clean deprotonation and formation of the unbridged bis(dimethylaminohydropentalenyl)ZrCl2 complexes 10b. The compounds 2a, 9a, meso-10b, 12a and 12c were characterized by X-ray diffraction.

UR - http://www.scopus.com/inward/record.url?scp=77957896408&partnerID=8YFLogxK

U2 - 10.1039/c0dt00515k

DO - 10.1039/c0dt00515k

M3 - Article

AN - SCOPUS:77957896408

SN - 1477-9226

VL - 39

SP - 9973

EP - 9981

JO - Dalton Transactions

JF - Dalton Transactions

IS - 41

ER -

Zirconocene complexes bearing novel 3-dimethylamino-1,2-dihydropentalene derived ligand systems

Abstract

Access to Document

Other files and links

Fingerprint

Cite this