I couldn't find the Antoine constants. However, from the Celanese MSDS one can see that the vapor pressure at 20 deg C is about 5 kPa, and its BP at 101.3 kPa is ~92 deg C.
The data for pentanal is very similar. What could be the error if one assumes the same vapor pressure ?
The CRC Handbook gives for pentanal the following VP data,