1,3-Cycloheptadiene

1,3-Cycloheptadiene

ball-and-stick structure, cis-cis isomer
Names
Preferred IUPAC name Cyclohepta-1,3-diene
Other names 1,3-Cycloheptadiene
Identifiers
CAS Number	4054-38-0  Y
3D model (JSmol)	Interactive image
Abbreviations	1,3-CHDN
Beilstein Reference	1900733
ChemSpider	1847604  Y
ECHA InfoCard	100.021.603
EC Number	223-762-8
Gmelin Reference	1656
MeSH	1,3-cycloheptadiene
PubChem CID	19969
UNII	J778DM7DZN
UN number	3295
CompTox Dashboard (EPA)	DTXSID40193566
InChI InChI=1S/C7H10/c1-2-4-6-7-5-3-1/h1-4H,5-7H2 Key: GWYPDXLJACEENP-UHFFFAOYSA-N
SMILES C1CC=CC=CC1
Properties
Chemical formula	C7H10
Molar mass	94.157 g·mol−1
Appearance	Colorless liquid
Density	0.868 g cm−3
Melting point	−110.40 °C; −166.72 °F; 162.75 K
Boiling point	120.6 °C; 249.0 °F; 393.7 K
Refractive index (nD)	1.498
Thermochemistry
Heat capacity (C)	J K−1 mol−1
Std molar entropy (S⦵298)	J K−1 mol−1
Std enthalpy of formation (ΔfH⦵298)	kJ mol−1
Std enthalpy of combustion (ΔcH⦵298)	- kJ mol−1
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H225, H340, H350, H373
Precautionary statements	P201, P210, P308+P313
NFPA 704 (fire diamond)	2 3 0
Flash point	11 °C (52 °F; 284 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

1,3-Cycloheptadiene is a highly flammable cycloalkene that occurs as a colorless clear liquid.

Reactions

Over a heated Pt(111) surface, 1,3-cycloheptadiene binds to the platinum, loses hydrogen to form a cycloheptatriene, and when strongly heated forms a layer of carbon. ^[1]

References

1. Manner, William L.; Hostetler, Michael J.; Girolami, Gregory S.; Nuzzo, Ralph G. (1 August 1999). "Structures and Reactivities of Cycloheptane, Cycloheptene, 1,3-Cycloheptadiene, and Cycloheptatriene on Pt(111)". The Journal of Physical Chemistry B. 103 (32): 6752–6763. doi:10.1021/jp990501a.