Can I read The P4‐Phosphazene Base as Part of a New Metal‐Free Initiator System for the Anionic Polymerization of Methyl Methacrylate on EtoBox?

The P4‐Phosphazene Base as Part of a New Metal‐Free Initiator System for the Anionic Polymerization of Methyl Methacrylate by Dr. Thomas Pietzonka; Prof. Dr. Dieter Seebach is a Chemistry article available to read on EtoBox.

What is The P4‐Phosphazene Base as Part of a New Metal‐Free Initiator System for the Anionic Polymerization of Methyl Methacrylate about?

stable than 12. Structural reasons for this tendency can be found from the X-ray structure analyses of 9, 13, and 16. In these structures the 0-H ... 0 distances between the phenolate oxygen atoms and the aqua ligands are 2.72 (9), 2.70 (13), and 2.68 A (16). The 0 ... 0 distances within one triangular face of the octahedron, in whose corners are situated the phenolate oxygen atoms, are on average in 9: 2.82, in 13: 2.89, and in 16: 2.89 A, whereas this distance for the surface of the [M"(OH,),12+ octrahedron, which is bound through 0-H ... 0 contacts to 1 or 2 is in 9: 3.07, in 13: 3.07, and in 16: 2.88 A. From this it can be concluded that the triangular faces involving the oxygen atoms which lie opposite each other in 16 are better matched with respect to their size than those in 9 and 13, and thus 16 is more stable in solution. The effects are small and different bond strengths of the 0- H ... 0 interactions, a result of the differences in basicity of the phenolate and water oxygen atoms, may be a further factor. We are at present investigating the possibility of binding complexes of the type 1 and 2 with different 0 ... 0 distances and residual basicity of the 0 atoms to a pol

Who reads The P4‐Phosphazene Base as Part of a New Metal‐Free Initiator System for the Anionic Polymerization of Methyl Methacrylate?

Author

Dr. Thomas Pietzonka; Prof. Dr. Dieter Seebach

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley; Research Square (ISSN 0044-8249)

Published

1993

Language

EN

Field

Chemistry (Physical Sciences)