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Questions related from Ekaterina Stepanova
How shoud I switch off a rotary vane pump? Should I initially turn off the pump and then open the shutter to normalize the pressure? Or the order of the actions should be vice versa?
08 August 2019 3,317 3 View
Which type of bonds is more preferable when drawing chiral centers? Wedged and hashed wedged/hollow wedged bonds or bold and hashed bonds?
03 March 2018 4,419 1 View
How should one name an 1,3-dicarbonyl compound existing in enol form? According to IUPAC, should it be named as 1,3-dione or 3-hydroxy-2-en-1-one?
02 February 2018 4,645 0 View
I optimized two diastereomers in GAUSSIAN and got two values of total energy. So, I need to decide are these diastereomers energetically equal or one of them is more preferable termodinamically....
06 June 2017 335 5 View
What compound does result from Lawesson's Reagent after it thiolates smth?
11 November 2016 3,317 2 View
How to obtain dry DMF saturated with dry HCl?
10 October 2016 1,262 4 View
Does anybody have experience in ordering chemicals from Star Synthesis Co., Ltd? What was their contact information?
06 June 2016 4,775 1 View
Does anybody know where I can buy Ethyl 2-amino-4-methyl-5-phenylthiophene-3-carboxylate (CAS 4815-38-7)? We need 2kg of this compound.
06 June 2016 376 2 View
Does anybody have experience in ordering chemicals from Shanghai Systeam BioChem.,CO Ltd? What was their contact information?
06 June 2016 3,423 1 View
Are there any examples of Diels-Alder reaction in which carboxyl group (in acids or esters) acts as a part of a dien or a dienophile? What are the reasons of its inactivity in this reaction?
01 January 2015 2,573 3 View
