Copyright The Royal Society of Chemistry, 1998.

                      SUPPLEMENTARY DATA: TABLE 2.
                                    
                                    
  Kinetic Data for the Formation of Dihydrogen in the Reaction
Between
                 [NiH(dppe)2]+ and HCl in THF at 25.00C.
                                    
                                    
                                    
[NiH(dppe)2]+/mmol dm-3       [HCl]/mmol dm-3              
104kobs/s-1
     5.0                      10.0                         5.3
                              20.0                    5.5
                              50.0                    6.2
                              100.0                        5.5
                              200.0                        4.8

     2.5                      100.0                         5.1

     5.0                      10.0                     5.5a


footnote:
     a:   study in dichloromethane.