The Experimental Electron Density Distribution of A C-H→4C0 Bridged Complex

  • Lee Brammer
  • Edwin D. Stevens
Part of the NATO ASI Series book series (NSSB, volume 250)


C-H→M bridged species have generated particular interest in recent years1 with a view to their serving as models for the intermediate stages of oxidative addition of C-H to transition metals, a reaction of great importance in organometallic chemistry. The complex studied here, bis(cyclo-octane-1,5-diyl-dipyrazolylborate)Co(II), has \(\bar{1}\) symmetry about the central cobalt atom. The pseudo-octahedral coordination sphere involves ligation of 4 pyrazolyl nitrogen atoms in a square-plane and is completed by two agostic1 C-H→Co interactions (Figure 1). This coordination is particularly unusual as the parent bis(pyrazolyl) complex is tetrahedral with no agostic interactions.


Symmetry Constraint Neutron Diffraction Data Deformation Density Crystal Field Effect Agostic Interaction 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • Lee Brammer
    • 1
  • Edwin D. Stevens
    • 2
  1. 1.Chemistry DepartmentBrookhaven National LaboratoryUptonUSA
  2. 2.Department of ChemistryUniversity of New OrleansNew OrleansUSA

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