Porphine

Structural formula
General
Surname	Porphine
other names	21 H , 23 H -porphine; Porphyrin;
Molecular formula	C 20 H 14 N 4
Brief description	dark red crystals
External identifiers / databases
EC number	202-958-7
ECHA InfoCard	100.002.690
PubChem	66868
Wikidata	Q421246
properties
Molar mass	310.35 g mol −1
Melting point	> 360 ° C (decomposition)
solubility	soluble in pyridine , dioxane ; bad in chloroform and glacial acetic acid ; insoluble in acetone and diethyl ether ;
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Porphine is a heterocyclic (containing 4 nitrogen - atom ), aromatic (satisfies the Hückel rule : 4n + 2 π-electrons) chemical compound consisting of four pyrrole rings ( tetrapyrroles is established).

Among other things, porphine forms iron, magnesium and copper complexes. It is the parent compound of all porphyrins , the respiratory pigments. Important porphyrin complexes are z. B. the malice .

Due to the conjugated π-electron system, porphine is colored, deep red.

Resonance structures of porphins

Individual evidence

↑ ^a ^b ^c ^d ^e entry on porphyrins. In: Römpp Online . Georg Thieme Verlag, accessed on December 29, 2014.
↑ ^a ^b data sheet Porphin, ~ 85% from Sigma-Aldrich , accessed on February 24, 2013 ( PDF ).

Web links

Porphine: spectrum

[Römpp-1] ↑ ^a ^b ^c ^d ^e entry on porphyrins. In: Römpp Online . Georg Thieme Verlag, accessed on December 29, 2014.

[Sigma-2] ta sheet Porphin, ~ 85% from Sigma-Aldrich , accessed on February 24, 2013 ( PDF ).