« first day (4680 days earlier)      last day (3 days later) » 

02:44
2
Q: Copper Tarnishing

Koo SchadlerI am a metalpoint artist (a Renaissance technique in which one draws with a metal nib, most often silver), not by any stretch a chemist. Copper is among the many metals (any metal MHS 3 or less) that one can draw with on a specially prepared surface. It leaves a warm grey mark. The problem wit...

 
8 hours later…
10:41
3
Q: Steric inhibition of resonance in ortho-substituted benzoic acids

VishnuDue to Steric Inhibition of Resonance (SIR), the acidity of ortho-substituted benzoic acid increases with respect to benzoic acid. However, I'm unable to understand the reason behind this fact. We know that resonance stabilises a molecule and the absence of which decreases the stability. In the c...

 
10 hours later…
20:15
1
Q: Strained circles in molview structure predictions

Paul BrodersenI am trying to make a figure showing the structures of several cyanobacterial non-ribosomal peptides with MolView. Several of these contain rings, and the predicted structure of these rings differs markedly from the structures shown in papers. E.g., in Welker & Von Doehren (2006) the structure of...


« first day (4680 days earlier)      last day (3 days later) »