Alkylation and Acylation of Tetramethyl-2-tetrazene

Michejda, Christopher J.; Romans, D.

doi:10.1016/s0040-4039(01)88657-3

Cited by 7 publications

(9 citation statements)

References 7 publications

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“…The corresponding T M T t and T M H ? radicals are suggested to be formed by oxidation using the aminium radicals as the electron acceptor (7). Under the present photolytic conditions, the T M H t might b e formed a s shown in eqs.…”

Section: Spectroscopic Studies Of Tmt Decon~positionmentioning

confidence: 84%

“…Although no nrnr signal of TMT-H+ could be detected, this solution exhibited a weak esr signal for T M T ? (6,7,27) which decayed slowly over several days giving no new signal.…”

Section: Spectroscopic Studies Of Tmt Decon~positionmentioning

confidence: 99%

“…T M H h a s been proposed to be formed by dimerization of the dimethylamino radicals in the treatment of T M T with acylation or alkylation agents (6,7). The corresponding T M T t and T M H ?…”

Section: Spectroscopic Studies Of Tmt Decon~positionmentioning

confidence: 99%

“…Most of the investigations were carried out with tetramethyl-2-tetrazene (TMT) from which formylidene methylamine (CH, =NCH,) or its derivatives (e.g., the trimer 1, N,Nf,N"-trimethylhexahydrotriazine, or the hydrolysis products, methylamines and formaldehyde) are invariably the major products isolated (5)(6)(7)(8). A number of mechanisms proposed so far may be summarized as shown in eqs.…”

Section: Introductionmentioning

confidence: 99%

“…Investigations utilizing esr spectroscopy show that treatments of TMT with alkylating or acylating agent in acidic conditions give the fairly persistent radical cations T M T t and T M H t (tetramethylhydrazine), the formations of which have been suggested to involve an electron transfer (oxidation) to aminium radicals (6,7). Whether these two radicals participate in the subsequent reactions is obscure.…”

Section: Introductionmentioning

confidence: 99%

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Decomposition of tetramethyl-2-tetrazene under acidic conditions

Madgzinski¹,

Pillay²,

Richard³

et al. 1978

Can. J. Chem.

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Can. J. Chem. 56, 1657Chem. 56, (1978.Decompositions of tetramethyl-2-tetrazene (TMT) under acidic conditions were investigated by product analysis and by nmr and esr spectroscopic monitors. Photolysis in acetonitrile containing trifluoroacetic acid generated the dimethylaminium radical which added efficiently to an olefinic double bond. Some adducts contained a (CH3),NCH2-moiety, the immediate precursor of which could be CH2=N(CH3),+ species. Photolytic addition of TMT to norbornenes generated 2-norbornyl radicals that underwent coupling through the exo or endo side to give the dimers. Thermal decomposition in sulfuric acid in the presence of toluene gave N,N-dimethyltoluidines, N-methylphenethylamine, benzyltoluenes, and a plethora of other minor products in addition to a large amount of formylidene methylamine. The last compound was the major product when thermal decomposition of T M T was carried out in trifluoroacetic acid in the presence of toluene or anisol; amination products of aromatic substrates were low and contained only ortllo and porn isomers. TMT dissolved in these solvents exhibited the esr signal of the stable T M T t (the tetrazene cation radical) which did not react with cyclohexene. In concentrated sulfuric acid, T M T was decomposed in less than 15 min giving formylidene methylamine and dimethylamine as shown by nmr. In trifluoroacetic acid, the esr signal of tetramethylhydrazine cation radical ( T M H t ) emerged after the TMT solution was irradiated ; no dimethylaminium radical signal could be detected. The relationship of TMTf and TMHC with formation of the observed products remains unclear. Chem. 56, 1657Chem. 56, (1978.On a Ctudie, a I'aide de I'analyse des produits et par etudes spectroscopiques rmn et rpe la decomposition de la tetrarnethyltetrazene-2 (TMT) dans des conditions acides. La photolyse dans I'acetonitrile contenant de I'acide trifluoroacetique conduit a la formation de radical dimethylaminium qui s'additionne d'une f a~o n efficace a la double liaison olkfinique. Quelques produits contenaient une portion (CH3),NCH2-dont le prkcurseur immkdiat serait I'espece CH2N(CH3),+. L'addition photolytique du TMT aux norbornenes conduit a des radicaux norbornyl-2 qui subissent des couplages par les faces exo ou erldo pour conduire a des dimeres. La decomposition thermique dans I'acide sulfurique en presence de toluene conduit aux N,N-dimethyltoluidines, a la N-methylphenethylamine, aux benzyltoluenes et a toute une strie d'autres produits mineurs en plus d'une grande quantitt de formylidene methylamine. Ce dernier conrposk est le produit majeur lorsque la dCcomposition therrnique du TMT est effectuee dans I'acide trifluoroacetique en presence du toluene ou d'anisol; les produits d'amination des substrats aromatiques sont faibles et contiennent uniquement les isomeres orflro et pnrn. Lorsque le TMT est dissous dans ces solvants, il presente un signal rpe correspondant a I'entite T M T t (le radical cation tetraztne) qui ne rtagit pas avec le cyclohexene. Dans l'acide sulfurique co...

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Section: Spectroscopic Studies Of Tmt Decon~positionmentioning

confidence: 84%

“…Although no nrnr signal of TMT-H+ could be detected, this solution exhibited a weak esr signal for T M T ? (6,7,27) which decayed slowly over several days giving no new signal.…”

Section: Spectroscopic Studies Of Tmt Decon~positionmentioning

confidence: 99%

Section: Spectroscopic Studies Of Tmt Decon~positionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Decomposition of tetramethyl-2-tetrazene under acidic conditions

Madgzinski¹,

Pillay²,

Richard³

et al. 1978

Can. J. Chem.

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Polymerization of acrylonitrile initiated by 2‐tetrazene/haloacetic acid systems

Sugiyama

1976

Makromol. Chem.

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The polymerization of acrylonitrile initiated by binary 2-tetrazene/haloacetic acid systems was studied in N,N-dimethylformamide (DMF). A kinetic investigation was also undertaken of decomposition of 2-tetrazenes in the presence of various haloacetic acids in DMF. The decomposition rate decreased with increasing halogen-carbon bond energy of the haloacetic acid. ZUSAMMENFASSUNG:Eine Untersuchung uber die durch binare 2-Tetrazen/Halogenessigsaure-Systeme initiierte Polymerisation von Acrylnitril in N,N-Dimethylformamid (DMF) wurde durchgefuhrt. Weiterhin wurde die Kinetik der Zersetzung von 2-Tetrazenen in Gegenwart von Halogenessigsauren in D M F untersucht. Die Zersetzungsgeschwindigkeit nahm mit steigender Bindungsenergie der Halogen-Kohlenstoffbindung in den Halogenessigsauren zu.

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