azepine

{{Chembox

| verifiedrevid = 456082499

| ImageFileL1 = Azepine-2D-skeletal.png

| ImageSizeL1 = 105

| ImageAltL1 = Skeletal formula of azepine

| ImageFileR1 = Azepine-3D-balls.png

| ImageSizeR1 = 135

| ImageAltR1 = Ball-and-stick model of the Azepine molecule

| IUPACName=Azepine

| OtherNames=Azacycloheptatriene

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|??}}

| CASNo=291-69-0

| PubChem=6451476

| SMILES=C1=CC=CNC=C1

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 4953941

| InChI = 1/C6H7N/c1-2-4-6-7-5-3-1/h1-7H

| InChIKey = XYOVOXDWRFGKEX-UHFFFAOYAM

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/C6H7N/c1-2-4-6-7-5-3-1/h1-7H

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = XYOVOXDWRFGKEX-UHFFFAOYSA-N

}}

|Section2={{Chembox Properties

| C=6 | H=7 | N=1

| Appearance=

| Density=

| MeltingPt=

| BoilingPt=

| Solubility=

}}

|Section3={{Chembox Hazards

| MainHazards=

| FlashPt=

| AutoignitionPt =

}}

}}

Azepines are unsaturated heterocycles of seven atoms, with a nitrogen replacing a carbon at one position.{{Citation |last1=Smith |first1=Jason A. |title=Chapter 7 - Seven-Membered Rings |date=2011-01-01 |url=https://www.sciencedirect.com/science/article/pii/S0959638011220166 |volume=22 |pages=491–536 |editor-last=Gribble |editor-first=Gordon |publisher=Elsevier |language=en |access-date=2023-01-05 |last2=Molesworth |first2=Peter P. |last3=Hyland |first3=Christopher J. T. |last4=Ryan |first4=John H. |series=Progress in Heterocyclic Chemistry |doi=10.1016/S0959-6380(11)22016-6 |isbn=9780080966854 |editor2-last=Joule |editor2-first=John A.}}{{Cite journal |last1=Császár |first1=Attila G. |last2=Demaison |first2=Jean |last3=Rudolph |first3=Heinz Dieter |date=2015-03-05 |title=Equilibrium structures of three-, four-, five-, six-, and seven-membered unsaturated N-containing heterocycles |url=https://pubmed.ncbi.nlm.nih.gov/25340501/ |journal=The Journal of Physical Chemistry A |volume=119 |issue=9 |pages=1731–1746 |doi=10.1021/jp5084168 |issn=1520-5215 |pmid=25340501|bibcode=2015JPCA..119.1731C }}

The atoms are numbered starting with the nitrogen. The 1H form shown to the right is unstable and converts to the 3H form.[https://roempp.thieme.de/lexicon/RD-01-04108?context=search#/ Römpp Lexikon].