Isoquinoline

Isoquinoline
Names
	Preferred IUPAC name Isoquinoline
	Other names Benzo[c]pyridine; 2-benzazine
Identifiers
CAS Number	119-65-3 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:16092 ;
ChEMBL	ChEMBL12315 ;
ChemSpider	8098 ;
DrugBank	DB04329 ;
ECHA InfoCard	100.003.947
EC Number	204-341-8;
PubChem CID	8405;
UNII	JGX76Y85M6 ;
CompTox Dashboard (EPA)	DTXSID2047644 ;
	InChI InChI=1S/C9H7N/c1-2-4-9-7-10-6-5-8(9)3-1/h1-7H Key: AWJUIBRHMBBTKR-UHFFFAOYSA-N ; InChI=1/C9H7N/c1-2-4-9-7-10-6-5-8(9)3-1/h1-7H Key: AWJUIBRHMBBTKR-UHFFFAOYAX;
	SMILES C1(C=NC=C2)=C2C=CC=C1;
Properties
Chemical formula	C9H7N
Molar mass	129.162 g·mol−1
Appearance	Colorless oily liquid; hygroscopic platelets when solid
Density	1.099 g/cm3
Melting point	26–28 °C (79–82 °F; 299–301 K)
Boiling point	242 °C (468 °F; 515 K)
Acidity (pKa)	pKBH+ = 5.14
Magnetic susceptibility (χ)	−83.9·10−6 cm3/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Isoquinoline is an individual chemical specimen - a heterocyclic aromatic organic compound - as well as the name of a family of many thousands of natural plant alkaloids, any one of which might be referred to as "an isoquinoline". It is a structural isomer of quinoline. Isoquinoline and quinoline are benzopyridines, which are composed of a benzene ring fused to a pyridine ring. In a broader sense, the term isoquinoline is used to make reference to isoquinoline derivatives. 1-Benzylisoquinoline is the structural backbone in many naturally occurring alkaloids such as papaverine. The isoquinoline ring in these natural compound derives from the aromatic amino acid tyrosine.