Class PartialTChargePEOEDescriptor

All Implemented Interfaces:
IAtomicDescriptor, IDescriptor

public class PartialTChargePEOEDescriptor extends AbstractAtomicDescriptor

The calculation of total partial charges of an heavy atom is based on Partial Equalization of Electronegativity method (PEOE-PEPE) from Gasteiger.

They are obtained by summation of the results of the calculations on sigma- and pi-charges.

Parameters for this descriptor:
Name Default Description
no parameters
Miguel Rojas
See Also:
Dictionary pointer(s):
PartialTChargePEOE in the Descriptors Dictionary [qsar-descriptors:PartialTChargePEOE]
Source code:
Belongs to CDK module:
Created on:
  • Constructor Details

    • PartialTChargePEOEDescriptor

      public PartialTChargePEOEDescriptor()
      Constructor for the PartialTChargePEOEDescriptor object
  • Method Details

    • getSpecification

      public DescriptorSpecification getSpecification()
      Gets the specification attribute of the PartialTChargePEOEDescriptor object
      The specification value
    • setParameters

      public void setParameters(Object[] params) throws CDKException
      This descriptor does not have any parameter to be set.
      params - An array of Object containing the parameters for this descriptor
      CDKException - if invalid number of type of parameters are passed to it
      See Also:
    • getParameters

      public Object[] getParameters()
      Gets the parameters attribute of the PartialTChargePEOEDescriptor object
      The parameters value
      See Also:
    • getDescriptorNames

      public String[] getDescriptorNames()
      Description copied from interface: IDescriptor
      Returns an array of names for each descriptor value calculated. Many descriptors return multiple values. In general it is useful for the descriptor to indicate the names for each value. In many cases, these names can be as simple as X1, X2, ..., XN where X is a prefix and 1, 2, ..., N are the indices. On the other hand it is also possible to return other arbitrary names, which should be documented in the Javadocs for the descriptor (e.g., the CPSA descriptor). Note that by default if a descriptor returns a single value (such as ALOGPDescriptor the return array will have a single element
      An array of descriptor names, equal in length to the number of descriptor calculated..
    • calculate

      public DescriptorValue calculate(IAtom atom, IAtomContainer ac)
      The method returns partial total charges assigned to an heavy atom through PEOE method. It is needed to call the addExplicitHydrogensToSatisfyValency method from the class tools.HydrogenAdder.
      atom - The IAtom for which the DescriptorValue is requested
      ac - AtomContainer
      an array of doubles with partial charges of [heavy, proton_1 ... proton_n]
    • getParameterNames

      public String[] getParameterNames()
      Gets the parameterNames attribute of the PartialTChargePEOEDescriptor object
      The parameterNames value
    • getParameterType

      public Object getParameterType(String name)
      Gets the parameterType attribute of the PartialTChargePEOEDescriptor object
      name - Description of the Parameter
      An Object of class equal to that of the parameter being requested
    • initialise

      public void initialise(IChemObjectBuilder builder)
      Default implementation of initialise allows optional override.
      Specified by:
      initialise in interface IDescriptor
      builder - chem object build