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| CAS No.: | 3100-04-7 |
|---|---|
| Name: | 1-Methylcyclopropene |
| Molecular Structure: | |
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| Formula: | C4H6 |
| Molecular Weight: | 54.0916 |
| Synonyms: | 1-MCP;Cyclopropene, 1-methyl-;1-Methylecyclopropene;AFXRD 020;AFXRD 038;EthylBloc;Fitomag;SmartFresh; |
| Density: | 0.838 g/cm3 |
| Melting Point: | 75-76 °C |
| Boiling Point: | 6.8oC at 760 mmHg |
| PSA: | 0.00000 |
| LogP: | 1.33640 |

| Conditions | Yield |
|---|---|
| With sodium hydride In toluene at 20 - 30℃; for 2h; Reagent/catalyst; Temperature; Solvent; Inert atmosphere; | 92.6% |
| With lithium diisopropyl amide In mineral oil at 23℃; for 1.5h; Reagent/catalyst; Temperature; Time; Inert atmosphere; | 60% |
| With lithium diisopropyl amide In mineral oil at 23℃; for 1.5h; Inert atmosphere; | 60% |

| Conditions | Yield |
|---|---|
| With sodium amide | A 40% B n/a |
| With sodium hexamethyldisilazane In tetrahydrofuran at 65℃; Product distribution; Further Variations:; Reagents; Solvents; Temperatures; | |
| With potassium hexamethylsilazane In toluene at -78 - 110℃; for 0.25h; Sealed tube; Reflux; Inert atmosphere; | |
| With sodium amide; sodium t-butanolate In tetrahydrofuran at 65℃; for 9h; Schlenk technique; Inert atmosphere; |

1,3-dibromo-2-methylpropene


Methylcyclopropen

| Conditions | Yield |
|---|---|
| With ethanol; zinc at 70℃; |

| Conditions | Yield |
|---|---|
| With zinc In N,N-dimethyl-formamide at 25 - 30℃; Title compound not separated from byproducts; | A 8 % Chromat. B 56 % Chromat. |
| With zinc In N,N-dimethyl-formamide at 25 - 30℃; Product distribution; dechlorination of polychloroalkanes containing -CCl2CH2CCl2- group; | A 8 % Chromat. B 56 % Chromat. |

| Conditions | Yield |
|---|---|
| With zinc In N,N-dimethyl-formamide at 25 - 30℃; Title compound not separated from byproducts; | A 4 % Chromat. B 29 % Chromat. |

methylene


prop-1-yne

A

but-1-yne

B

dimethylacetylene

C

Methylcyclopropen

| Conditions | Yield |
|---|---|
| Rate constant; |


| Conditions | Yield |
|---|---|
| With sodium amide In ammonia at -78℃; |

3-Chloro-2-methylpropene

A

dimethylacetylene

B

buta-1,3-diene

C

Methylcyclopropen

D

methylene cyclopropane

| Conditions | Yield |
|---|---|
| With sodium amide In tetrahydrofuran Yield given. Yields of byproduct given. Title compound not separated from byproducts; |


1,2-diiodo-1-methylcyclopropane


Methylcyclopropen

| Conditions | Yield |
|---|---|
| With ethylene dibromide; zinc In tetrahydrofuran for 20h; Reactivity; | |
| With polymeric reagent In methanol at 20℃; Reactivity; | |
| With potassium tert-butylate; para-thiocresol In DMF (N,N-dimethyl-formamide) at 20℃; for 0.25h; Reactivity; |

1-methyl-1-(methanesulfonyloxy)-2-(trimethylsilyl)cyclopropane

A

trimethylsilyl fluoride

B

Hexamethyldisiloxane

C

Methylcyclopropen

| Conditions | Yield |
|---|---|
| With tetrabutyl ammonium fluoride In dimethyl sulfoxide at -78 - 25℃; Reactivity; Inert atmosphere; |

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Molecule structure of 1-Methylcyclopropene (CAS NO.3100-04-7):
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IUPAC Name: 1-Methylcyclopropene
Molecular Weight: 54.09044 g/mol
Molecular Formula: C4H6
Density: 0.838 g/cm3
Index of Refraction: 1.474
Molar Refractivity: 18.14 cm3
Molar Volume: 64.5 cm3
Surface Tension: 25 dyne/cm
XLogP3-AA: 1
Exact Mass: 54.04695
MonoIsotopic Mass: 54.04695
Canonical SMILES: CC1=CC1
InChI: InChI=1S/C4H6/c1-4-2-3-4/h2H,3H2,1H3
InChIKey: SHDPRTQPPWIEJG-UHFFFAOYSA-N
1-Methylcyclopropene (CAS NO.3100-04-7) is used commercially to slow down the ripening of fruit and to help maintain the freshness of cut flowers.
1-Methylcyclopropene (CAS NO.3100-04-7) is also named as 1-MCP ; EPA Pesticide Chemical Code 224459 ; EthylBloc ; HSDB 7517 ; MCP ; SmartFresh ; Cyclopropene, 1-methyl- . 1-Methylcyclopropene (CAS NO.3100-04-7) is a volatile gas at standard temperature and pressure with a boiling point of ~12 °C.