Ein Herstellungsverfahren fürN,N,N′,N′,N″,N″ - Hexaalkylguanidinium-chloride

Kantlehner, Willi; Haug, Erwin; Mergen, W. W.; Speh, P.; Maier, Thomas; Kapassakalidis, Joanis J.; Bräuner, Hans-Jürgen; Hagen, Helmut

doi:10.1055/s-1983-30558

Cited by 24 publications

(9 citation statements)

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“…Additionally, formation of some precipitate was observed. Then, 5.00 mmol (0.90 g) of (Me 2 N) 3 CCl was added and stirring was continued for 18 h at room temperature. The solvent of the resulting green-blue suspension was evaporated in vacuo and the residue extracted with 150 mL of pentane.…”

Section: Methodsmentioning

confidence: 99%

On the Way to Heptahexaenylidene Complexes: Trapping of an Intermediate with the Novel MCCCCCCCR₂ Moiety

Roth

Fischer

1996

Organometallics

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Sequential treatment of the in situ generated heptatriyne Me 3 SiCtCCtCCtCC(NMe 2 ) 3 with n-BuLi, (CO) 5 W [THF], and BF 3 ‚OEt 2 affords the first alkenylsubstituted pentatetraenylidene complex, (CO) 5 WdCd CdCdCdC(NMe 2 )C(H)dC(NMe 2 ) 2 ( 4), via addition of dimethylamine to the C dC ζ bond of the intermediate heptahexaenylidene complex (CO) In addition, the alkynyl(butatrienyl)carbene complex (CO) 5 WdC(CtCSiMe 3 )C(Bu)dCd CdC(NMe 2 ) 2 ( 5) is formed.

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Section: Methodsmentioning

confidence: 99%

On the Way to Heptahexaenylidene Complexes: Trapping of an Intermediate with the Novel MCCCCCCCR₂ Moiety

Roth

Fischer

1996

Organometallics

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“…The mixture was warmed to 15 °C within 5 h and then stirred for 1 h at room temperature. A 5.00 mmol (0.90 g) amount of (Me 2 N) 3 CCl was added, and stirring was continued for 18 h. The solvent was evaporated in vacuo. The residue was extracted with 100 mL of pentane.…”

Section: Methodsmentioning

confidence: 99%

Complexes with Diamino-Substituted Unsaturated C₃ and C₅ Ligands: First Group 6 Pentatetraenylidenes and New Allenylidene Complexes

Roth

Fischer

1996

Organometallics

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Sequential reaction of [(CO)5M(THF)] (M = Cr (1a), W (1b)) with Li[C⋮CC(NMe2)3] and BF3·OEt2 afforded the first diaminoallenylidene complexes [(CO)5MCCC(NMe2)2] (M = Cr (2a), W (2b)). These compounds are inert toward nucleophilic attack of HNMe2 at room temperature. 2b was characterized by an X-ray structural analysis. Treatment of 1 with the cumulogous acetylide Li[C⋮CC⋮CC(NMe2)3] and then with BF3·OEt2 produced the first group 6 pentatetraenylidene complexes, [(CO)5MCCCCC(NMe2)2] (M = Cr (3a), W (3b)). The X-ray structural analysis of 3b reveals a strong alternation of the CC bond lengths within the (CO)5MC5 unit. Although the compounds 3 are stable at room temperature, they quantitatively add HNMe2 within 30 min to give the alkenyl(amino)allenylidene complexes [(CO)5MCCC(NMe2)C(H)C(NMe2)2] (M = Cr (4a), W (4b)). Complex 4b was characterized by an X-ray structural analysis. 4b is the first example of an open chain metal alkenylallenylidene with an s-cis conformation. The complexes 4 are comparable in stability and inertness toward nucleophiles such as amines to the metal diaminoallenylidenes 2. The spectroscopic data and the X-ray structural analyses of 2b, 3b, and 4b indicate that these heteroatom-substituted compounds are best described as hybrids of metallacumulene and strongly polarized alkynyl structures.

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“…The organic cation was found to be N,N,N',N',N'',N''-hexaethylguanidinium (HEG). Compounds of this type have been pioneered by W. Kantlehner [8][9][10]. Their use as phase-transfer catalysts is well documented [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Hexaethylguanidinium Salts

et al. 2014

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Ein Herstellungsverfahren fürN,N,N′,N′,N″,N″ - Hexaalkylguanidinium-chloride

Cited by 24 publications

References 0 publications

On the Way to Heptahexaenylidene Complexes: Trapping of an Intermediate with the Novel MCCCCCCCR₂ Moiety

On the Way to Heptahexaenylidene Complexes: Trapping of an Intermediate with the Novel MCCCCCCCR₂ Moiety

Complexes with Diamino-Substituted Unsaturated C₃ and C₅ Ligands: First Group 6 Pentatetraenylidenes and New Allenylidene Complexes

Hexaethylguanidinium Salts

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Ein Herstellungsverfahren fürN,N,N′,N′,N″,N″ - Hexaalkylguanidinium-chloride

Cited by 24 publications

References 0 publications

On the Way to Heptahexaenylidene Complexes: Trapping of an Intermediate with the Novel MCCCCCCCR2 Moiety

On the Way to Heptahexaenylidene Complexes: Trapping of an Intermediate with the Novel MCCCCCCCR2 Moiety

Complexes with Diamino-Substituted Unsaturated C3 and C5 Ligands: First Group 6 Pentatetraenylidenes and New Allenylidene Complexes

Hexaethylguanidinium Salts

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On the Way to Heptahexaenylidene Complexes: Trapping of an Intermediate with the Novel MCCCCCCCR₂ Moiety

On the Way to Heptahexaenylidene Complexes: Trapping of an Intermediate with the Novel MCCCCCCCR₂ Moiety

Complexes with Diamino-Substituted Unsaturated C₃ and C₅ Ligands: First Group 6 Pentatetraenylidenes and New Allenylidene Complexes