Molecular objects

As outlined in Section III.A, knowledge of the molecular wavefunction implies knowledge of the electron distribution. By setting a threshold value for this function, the molecular boundaries can be established, and the path is open to a definition of molecular shape. A quicker, but quite effective, approach to this entity is taken by assuming that each atom in a molecule contributes an electron sphere, and that the overall shape of a molecular object results from interpenetration of these spheres. The necessary radii can be obtained by working backwards from the results of MO calculations21, or from some kind of empirical fitting22. 

Bunz UHF (1999) Carbon-Rich Molecular Objects from Multiply Ethynylated p-Complexes. 201 131-161... 

Bray KL (2001) High Pressure Probes of Electronic Structure and Luminescence Properties of Transition Metal and Lanthanide Systems. 213 1 - 94 Bunz UHF (1999) Carbon-Rich Molecular Objects from Multiply Ethynylated rr-Complexes. 201 131-161... 

Carbon-Rich Molecular Objects from Multiply Ethynylated 77-Complexes... 

With the enhanced stability as compared to that of 63 e, 76 should be an ideal starting material for the construction of larger organometallic molecular objects of dendrimeric, cyclic or polymeric nature. 

This chapter draws a comprehensive picture of what has been done in the field of dendrimers with polymeric cores putting emphasis first on synthetic issues and then on experiments investigating the aggregation behavior of these intruiging macromolecules both in the solid state and on surfaces. Additionally, experiments will be described which show that some of these dendrimers can be considered cylindrical molecular objects. The macromolecules treated in this chapter may be considered as either dendrimers with polymeric core or alternatively dendronized polymers (or polymers with appendent dendrons) depending on whether one sees them from the vantage point of an organic or macromolecular chemist. 

Keywords Dendrimers, polymers, molecular objects, scanning force microscopy, macromonomers. 

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