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Jan
  • Member for 8 years
  • Last seen more than a week ago
  • Hesse, Germany
69 votes
4 answers
32k views

Why do elements in columns 6 and 11 assume 'abnormal' electron configurations?

66 votes
1 answer
10k views

Why does F replace the axial bond in PCl5?

  • 1,417
56 votes
3 answers
11k views

Why do we write NH3?

  • 1,225
55 votes
6 answers
11k views

The last element's atomic number

51 votes
2 answers
16k views

Regioselectivity of acid-catalyzed ring-opening of epoxides

  • 41.6k
41 votes
2 answers
23k views

How can the dipole moment of carbon monoxide be rationalised by molecular orbital theory?

  • 663
38 votes
1 answer
1k views

Relativistic effect: d-electrons in metallorganic complexes

  • 3,365
34 votes
3 answers
11k views

Does O2 have a color in the gas phase

  • 2,087
34 votes
1 answer
5k views

Stereoselectivity of dihydroxylation with osmium tetroxide

  • 7,400
33 votes
1 answer
3k views

Unusual Friedel–Crafts alkylation with pivaloyl chloride

  • 2,625
33 votes
1 answer
3k views

Is there an energy cost associated with flipping the spin of an electron?

  • 4,559
31 votes
1 answer
20k views

Why does the unstabilised Wittig reaction selectively form cis alkenes?

31 votes
3 answers
12k views

Are there non-transparent gases?

  • 1,476
26 votes
1 answer
861 views

Do vinyl cations adopt a classical or non-classical structure?

  • 15k
26 votes
1 answer
15k views

Why doesn't the SeO2 oxidation of ketones stop at the hydroxyketone stage?

  • 1,952
25 votes
1 answer
56k views

What is the role of sulfuric acid and mercury(II) sulfate in the oxymercuration of alkynes?

  • 6,364
25 votes
1 answer
314 views

How were old style stereographic structures produced?

  • 2,168
23 votes
1 answer
1k views

Why do we have an alkyl shift rather than epoxidation in a pinacol reaction?

  • 627
23 votes
3 answers
2k views

What is Y-aromaticity? Is the trinitromethanide anion aromatic?

  • 15k
23 votes
2 answers
8k views

PBP vs TBP geometry?

  • 2,487
22 votes
1 answer
6k views

Molecular chirality and optical rotation

  • 6,455
22 votes
2 answers
8k views

Usage of ammine vs amine in nomenclature

  • 4,997
21 votes
1 answer
2k views

Why does tin form tin (II) compounds?

  • 730
21 votes
5 answers
5k views

Can gases be "immiscible"?

  • 1,612
21 votes
1 answer
2k views

Is a compound aromatic if it also has anti-aromatic rings?

  • 7,400
21 votes
2 answers
4k views

Why is the endo product the major product in a Diels-Alder reaction?

  • 561
20 votes
1 answer
6k views

What is the nature of the bonding in cyclotriphosphazene?

  • 16.7k
20 votes
2 answers
5k views

Jahn-Teller Distortions in Square Planar Complexes?

20 votes
4 answers
14k views

Addition of HOBr across C=C

  • 16.7k
19 votes
1 answer
2k views

Multiplet shape in proton NMR of morpholines

  • 66.3k
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