Reaction Toolkit Introduction:

Vector bindings:

• Used to express an 'environment' around an atom.

• Relevant only in the context of molecules.

• Hence, vbinds cannot use reaction expressions:
  • [$(CCC>>CCC)] is not legal, but

  • [$(CCC)]>>CCC is legal.

• dt_vmatch(reaction_pattern, anytarget...) returns (-1) always.