swim is grateful for the responses and apologizes for his tardy reply.
swim's use for this is part of a vacuum distillation setup as per the thread
Post 454619
(scarmani: "Synthesis of 2,5-dimethoxy-1-ethylbenzene", Newbee Forum)(especially No 458275). irrespective of such use, the column was broken recently due to mishandling. in its place was ordered 2 vigreux columns, of lengths 150mm and 200mm (24/40 joints).
there are 2 vacuum fractionations for which this column is required:
1) 65°C @ .7mmHg; this is a modification of a fractionation that is "supposed" to occur (see earlier cited thread) from 120-140°C at the water pump (assume ~15mmHg). the boiling point goes right down to 65°C when extrapolated using the Clausius-Clayperton equation for this setup, and this is the first fraction that comes out of the sample.
2) 110-135°C @ .7mmHg; this is modified from 90-110°C @ .2mmHg, see appropriate religious text for elucidation:
"The organic phase was stripped under vacuum yielding 10.8 g of a dark viscous oil. This was distilled at 90-110 °C at 0.2 mm/Hg to yield a colorless oil that, on cooling, set to white crystals."
distillation 2 has yet to occur in the lab (column accident occurred immediately prior to attempt), see referenced thread for setups. the setup will change slightly with a 2-way adapter at the bottom of the vigreux column to accomodate having the vacuum bleed into the reaction flask. this is an attempt to control bumping, which was severe during fractionation 1.