There are still a large number of research activities involving Vitamin B₁₂, indeed the subject is increasing in popularity

• Watch the spaces for more examples!
• 2002: How Bacteria Get Their Vitamin B12 : Science 2002 May 10; 296: 977 (in This Week in Science)
• 2001: Good news for beer drinkers
• 2000:
• 1999:
  • Interest in other cobalt metalloenzymes is growing.
  • The dehydration step in the enzyme-coenzyme-B₁₂ catalyzed diol dehydrase reaction of 1,2-dihydroxyethane has been examined theoretically Link to the ACS J.Phys.Chem B for which you need a subscription.
• 1998: Methylcobalt, methylnickel, iron-carbonyl, and acetylmetal intermediates are identifiable
• 1997:
  • We had an amazing Molecular Spring from Bernhard Kräutler's group at Innsbruck.
  • Also an unusal model complex
  • A fascinating insight into the biosynthesis.
• 1996:
• 1995: First cobalt pentammine alkyl
• 1994:
• 1993:
• 1992:
• 1991:
• 1990: Rhodoximes