Porphin

Porphin

Names
Other names Porphine
Identifiers
CAS Number	101-60-0 Y
3D model (Jmol)	Interactive image
ChEBI	CHEBI:8337 Y
ChemSpider	10447586 Y
ECHA InfoCard	100.002.690
PubChem CID	66868
UNII	604BGD9J5B Y
InChI InChI=1S/C20H14N4/c1-2-14-10-16-5-6-18(23-16)12-20-8-7-19(24-20)11-17-4-3-15(22-17)9-13(1)21-14/h1-12,21,24H/b13-9-,14-10-,15-9-,16-10-,17-11-,18-12-,19-11-,20-12- Y Key: RKCAIXNGYQCCAL-CEVVSZFKSA-N Y InChI=1/C20H14N4/c1-2-14-10-16-5-6-18(23-16)12-20-8-7-19(24-20)11-17-4-3-15(22-17)9-13(1)21-14/h1-12,21,24H/b13-9-,14-10-,15-9-,16-10-,17-11-,18-12-,19-11-,20-12- Key: RKCAIXNGYQCCAL-CEVVSZFKBA
SMILES c1c/2[nH]c(c1)/cc/3\nc(/cc/4\[nH]/c(c\c5n/c(c2)/C=C5)/cc4)C=C3
Properties
Chemical formula	C20H14N4
Molar mass	310.35196 g/mol
Appearance	Dark red, shiny leaflets
Melting point	N/A
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

Porphin, sometimes spelled porphine, is the parent chemical compound for types of biochemically significant compounds called porphyrins. The chemical formula of porphin is C₂₀H₁₄N₄. Porphin is an organic compound that is aromatic and heterocyclic since its chemical structure, shown at right, essentially consists of four pyrrole rings joined together by four methine (=CH—) groups to form a larger macrocycle ring. The compound itself is a solid.

Around the perimeter of the macrocycle ring, there is a cyclic chain of sp²hybridized carbon atoms, all of which are part of a conjugated double bond system, giving the molecule its aromatic character. Resonance structures for porphin can be drawn as shown below here.

The aromatic character of porphin stems both from its conjugation as well as its flat or planar geometry, meaning that all the atoms lie in a single plane. Bonded to the cyclic chain of carbons are four nitrogen atoms facing the center of the molecule, two of which are bonded to hydrogen atoms and the other two nitrogens forming part of the conjugated double bond system.