*
*                Copyright (c) Merck and Co., Inc., 1994
*                         All Rights Reserved
*
* MMFF SYMBOLIC TYPES FOR HYDROGEN FOR SPECIFIED PARENT TYPES
*
* PARENT HYDROGEN 
* TYPE    TYPE
*
  CR      HC
  C=C     HC
  CSP2    HC
  C=O     HC
  C=N     HC
  CGD     HC
  C=OR    HC
  C=ON    HC
  CONN    HC
  COO     HC
  COON    HC
  COOO    HC
  C=OS    HC
  C=S     HC
  C=SN    HC
  CSO2    HC
  C=SO    HC
  CSS     HC
  C=P     HC
  CSP     HC
  =C=     HC
  OR      HOR
  OC=O    HOCO
  OC=C    HOCC
  OC=N    HOCN
  OC=S    HOCS  ! NEW
  ONO2    HON   ! NEW
  ON=O    HON   ! NEW
  OSO3    HOS
  OSO2    HOS
  OSO     HOS
  OS=O    HOS
  -OS     HOS
  OPO3    HOP
  OPO2    HOP
  OPO     HOP
  -OP     HOP
  -O-     HO
  NR      HNR
  N=C     HN=C
  N=N     HN=C
  NC=O    HNCO
  NC%N    HNC%
  NC%C    HNC%
  NC=S    HNCS
  NN=C    HNNC
  NN=N    HNNN
  F       HX
  CL      HX
  BR      HX
  I       HX
  S       HS 
  >S=N    HS=N
  SNO     HSNO
  SI      HSI
  CR4R    HC
  CR3R    HC
  PO3     HP
  PO2     HP
  PO      HP
  PTET    HP
  P       HP
  CE4R    HC
  NR+     HNR+
  OM      HOM
  CB      HC 
  NPYL    HPYL
  NC=C    HNCC
  NC=N    HNCN
  CO2M    HC 
  CS2M    HC 
  NSO2    HNSO
  NSO3    HNSO
  NPO2    HNPO
  NPO3    HNPO
  NO2     HNO2
  N=O     HNO
  NSO     HNSO
  O+      HO+
  O=+     HO=+
  O%+     HO%+
  N+=C    HNC+
  N+=N    HNN+  ! NEW
  NCN+    HNN+
  NGD+    HGD+
  NIM+    HIM+
  NPD+    HPD+
  N5A+    HN5+
  N5B+    HN5+
  N5+     HN5+
  NPYL    HPYL
  CIM+    HC
  CGD+    HC
  CNN+    HC
  NM      HNM
  C5A     HC 
  C5B     HC
  C5      HC
  N2OX    HNOX
  N3OX    HNOX
  OH2     HOH
  -P=C    HP
$