Chemistry:1,2,3,4-Tetraphenylnaphthalene

1,2,3,4-Tetraphenylnaphthalene

Names
Preferred IUPAC name 1,2,3,4-Tetraphenylnaphthalene
Identifiers
CAS Number	751-38-2 Y
3D model (JSmol)	Interactive image Interactive image
ChemSpider	62982 Y
EC Number	623-131-0
PubChem CID	69783
UNII	AQ533SQ362 Y
InChI InChI=1S/C34H24/c1-5-15-25(16-6-1)31-29-23-13-14-24-30(29)32(26-17-7-2-8-18-26)34(28-21-11-4-12-22-28)33(31)27-19-9-3-10-20-27/h1-24H Y Key: UCTTYTFENYGAPP-UHFFFAOYSA-N Y InChI=1/C34H24/c1-5-15-25(16-6-1)31-29-23-13-14-24-30(29)32(26-17-7-2-8-18-26)34(28-21-11-4-12-22-28)33(31)27-19-9-3-10-20-27/h1-24H Key: UCTTYTFENYGAPP-UHFFFAOYAS
SMILES C1=CC=C(C=C1)C2=C(C(=C(C3=CC=CC=C32)C4=CC=CC=C4)C5=CC=CC=C5)C6=CC=CC=C6 c15ccccc1c(c2ccccc2)c(c3ccccc3)c(c4ccccc4)c5c6ccccc6
Properties
Chemical formula	C34H24
Molar mass	432.55 g/mol
Melting point	199 to 201 °C (390 to 394 °F; 472 to 474 K)
Hazards
GHS pictograms
GHS Signal word	Warning
GHS hazard statements	H315, H319, H335
GHS precautionary statements	P261, P264, P271, P280, P302+352, P304+340, P305+351+338, P312, P321, P332+313, P337+313, P362, P403+233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

1,2,3,4-Tetraphenylnaphthalene is a polycyclic aromatic hydrocarbon commonly prepared in the undergraduate teaching laboratory as an introduction to the Diels-Alder reaction, in this case between benzyne, which acts as the dienophile, (generated in situ) and tetraphenylcyclopentadienone, which acts as the diene. It has two crystalline forms, and therefore has two different melting points.