9,9-Dimethyl-4,5-bis(di-tert-butylphosphino)xanthene

4,5-二(二叔丁基膦)-9,9-二甲基氧杂蒽

Also known as: t-Bu-Xantphos, 4,5-Bis(di-tert-butylphosphino)-9,9-dimethylxanthene, 4,5-Bis[di(tert-butyl)phosphino]-9,9-dimethyl-9H-xanthene, ditert-butyl-(5-ditert-butylphosphanyl-9,9-dimethylxanthen-4-yl)phosphane, 9,9-Dimethyl-4,5-bis(di-t-butylphosphino)xanthene, t-Bu-XANTPHOS

9,9-Dimethyl-4,5-bis(di-tert-butylphosphino)xanthene (CAS 856405-77-1) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C31H48OP2 and a molecular weight of 498.66000 g/mol. It is also known as t-Bu-Xantphos, 4,5-Bis(di-tert-butylphosphino)-9,9-dimethylxanthene and 4,5-Bis[di(tert-butyl)phosphino]-9,9-dimethyl-9H-xanthene. Key property: a melting point of 153-157°C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

856405-77-1

Jingsj CID

J-1520633-0

Molecular Formula

C₃₁H₄₈OP₂

Chinese Name

4,5-二(二叔丁基膦)-9,9-二甲基氧杂蒽

Molecular Weight

498.66000 g/mol

Category

Aromatic Hydrocarbons

Last updated

8/21/2026