Summary
Diazodiphenylmethane is an organic reagent with the chemical formula C13H10N2. It exists as red-black crystals that melts just above room temperature.[1]
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| Names | |
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| Preferred IUPAC name
(Diazomethylene)dibenzene | |
| Other names
Diazodiphenylmethane
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider |
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| MeSH | C480088 |
PubChem CID
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| UNII |
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CompTox Dashboard (EPA)
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| Properties | |
| C13H10N2 | |
| Molar mass | 194.237 g·mol−1 |
| Appearance | red-black solid |
| Melting point | 30 °C (86 °F; 303 K) |
| −115·10−6 cm3·mol−1 | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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unstable |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Preparation edit
Diazodiphenylmethane can be synthesized via the oxidation of benzophenone hydrazone with mercury(II) oxide in diethyl ether and the presence of a basic catalyst.[2] An improved procedure involves dehydrogenation with oxalyl chloride.[3]
Uses edit
It can be used to synthesise (diphenyl)methyl esters and ethers with carboxylic acids and alcohols respectively.[4][5]
It can also generate the (diphenyl)methyl carbene and nitrogen gas upon illumination by ultraviolet light or heating.[6][7] It can also be electrolysed to form the Ph2CN−
2 anion, which can decompose to form the Ph2C− anion radical. If carried out in dimethylformamide and tetrabutylammonium perchlorate, these can react to form benzophenone azine, which has the formula Ph2C=N-N=CPh2.[8]
References edit
- ^ "Diphenyldiazomethane;1,1'-(Diazomethylene)bisbenzene;Diazodiphenylmethane,physical properties,suppliers,CAS,MSDS,structure,Molecular Formula, Molecular Weight ,Solubility,boiling point, melting point". chemyq.com. Archived from the original on 2016-08-04. Retrieved 2016-06-06.
- ^ Miller, J (1959-04-01). "Notes- Preparation of Crystalline Diphenyldiazomethane". The Journal of Organic Chemistry. 24 (4): 560–561. doi:10.1021/jo01086a603. ISSN 0022-3263.
- ^ "orgsyn.org/demo.aspx?prep=V85P0189". orgsyn.org. Retrieved 2017-03-11.
- ^ Jovanovic, Bratislav; Assaleh, Fathi; Marinkovic, Aleksandar (2004). "Kinetics of the reaction of 5-substituted orotic acids with diazodiphenylmethane". Journal of the Serbian Chemical Society. 69 (11): 949–953. doi:10.2298/jsc0411949j. Archived from the original on 2020-02-13.
- ^ Petursson, Sigthor (2003-04-22). "Tin(II) chloride catalyzed reactions of diazodiphenylmethane with vicinal diols in an aprotic solvent. The reactions with cis- and trans-1,2-cyclohexanediols and 1,2-propanediol". Carbohydrate Research. 338 (9): 963–968. doi:10.1016/S0008-6215(03)00039-9.
- ^ Parker, Vernon D.; Bethell, Donald (1987-08-01). "Carbene cation radicals: the kinetics of their formation from diazoalkane cation radicals and their reactions". Journal of the American Chemical Society. 109 (17): 5066–5072. doi:10.1021/ja00251a002. ISSN 0002-7863.
- ^ Sabongi, Gebran J. (2012-12-06). Chemical Triggering: Reactions of Potential Utility in Industrial Processes. Springer Science & Business Media. ISBN 9781461309079.
- ^ McDonald, Richard N.; Triebe, F. M.; January, J. R.; Borhani, K. J.; Hawley, M. D. (1980-12-01). "Hypovalent radicals. 6. Electroreduction of diazodiphenylmethane - intermediacy of Ph2CN2-.cntdot. and Ph2C-.cntdot". Journal of the American Chemical Society. 102 (27): 7867–7872. doi:10.1021/ja00547a007. ISSN 0002-7863.