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In the title mol­ecule, C 37 H 38 O 6 , the non-fused C atom belonging to the five-membered ring of the fluorene system is connected to two  p -phenyl­ene rings, the rings opening up the C ar­yl –C—C ar­yl  angle to 113.1 (1)°. The four-atom –O–CH 2 –C(=O)–O– chain between the  p -phenyl­ene ring and the  tert -butyl group assumes a more regular W-shaped conformation for one substituent [O—C—C—C torsion angle = 171.9 (2)°] but a less regular W-shaped conformation for the other [torsion angle = 147.4 (2)°].

Di-tert-butyl 2,2′-[9H-fluorene-9,9-diylbis(p-phenyleneoxy)]diacetate