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Core CIF Dictionary version 2.3

_chemical_conn_bond_[]

Name

'_chemical_conn_bond_[]'

Category: category_overview

Data type: null

Examples:

    loop_
    _chemical_conn_bond_atom_1
    _chemical_conn_bond_atom_2
    _chemical_conn_bond_type
       4     1     doub     4     3     sing
       4     2     sing     5     3     sing
       6     5     sing     7     6     sing
       8     7     sing     8     3     sing
       10    2     sing     12    9     doub
       12    11    sing     12    10    sing
       13    11    sing     14    13    sing
       15    14    sing     16    15    sing
       16    11    sing     17    5     sing
       18    5     sing     19    6     sing
       20    6     sing     21    7     sing
       22    7     sing     23    8     sing
       24    8     sing     25    13    sing
       26    13    sing     27    14    sing
       28    14    sing     29    15    sing
       30    15    sing     31    16    sing
       32    16    sing

Example 1 - based on data set DPTD of Yamin, Suwandi, Fun, Sivakumar & bin Shawkataly [(1996). Acta Cryst. C52, 951-953].

Definition

    	
   Data items in the _chemical_conn_atom_ and _chemical_conn_bond_
   categories record details about the 2D chemical structure of
   the molecular species. They allow a 2D chemical diagram to be
   reconstructed for use in a publication or in a database search
   for structural and substructural relationships.

   The _chemical_conn_bond_ data items specify the connections
   between the atoms in the _chemical_conn_atom_ list and the nature
   of the chemical bond between these atoms.
 


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