It is not general, but why usually solvent-free reactions produce higher yields?

Is it due to more interaction between reactants?

11 December 2015 1,073 0 View

Types of chemical bonds

08 September 2014 8,326 2 View

Is anybody familiar with the Biginelli reaction?

In the synthesis of 3,4-dihydropyrimidin-2(1H)- ones, in the last step of the reaction mechanism, why does an imine be produced not an enamine? (see attached file)

08 September 2014 3,815 7 View

Is it possible to dehydrate a molecule in aqueous solution?

For example throw a condensation reaction at 40 or 60 0C.For example, condensation of amines and carbonyl? and what if water were used as solvent?

07 August 2014 8,730 12 View

Can we say " All biocatalysts are enymes"?

Or is it better to say "Enzymes are the most important class of biocatalysts"?

05 June 2014 3,984 1 View

Why is a bond between an sp2 carbon and an sp3 carbon stronger than a bond between two sp3 carbons?

Is this about steric factors?

04 May 2014 6,692 12 View

Why does the phenolic -OH react with acetic anhydride but not acidic -OH in Aspirin synthesis from salicylic acid and acetic anhydride?

Is this because of more nucleophilicity of phenolic -OH?

01 February 2014 1,708 5 View

What does a "Pyridine- FTIR analysis" can tell me?

I mean the position and the strength of the peaks.

31 December 2013 8,253 4 View

Why usually nanoparticles prepared by PVP are smaller than those by PVA?

PVA: poly vinyl alcohol and PVP: poly vinyl pirrolidone. water as solvent.

31 December 2013 9,412 9 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Why should we choose deep learning to machine learning? Why is CNN better for image classification? Can I get Typical Answer?

What Characteristics makes CNN work better?

03 March 2021 1,458 4 View

What are some of the research gaps in machine learning and artificial intelligence in africa?

i would to know some of the research gaps in the artificial intelligence field in most african countries.

03 March 2021 6,145 3 View