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Boron Compounds with Macrocyclic Structures

A further example of a macrocyclic ring system with boron that is related to the structures of the metallocyclophanes mentioned before is compound 68 that can be prepared via condensation between two bis(borazaphenanthrene) molecules. [Pg.20]

The compounds [CymB(Pz)3]Tl (136) and [FcB(Pz)3]Tl show polymeric structures, with bridging B(Pz)3 fragments in the solid state. This is a result of unfavorable steric interaction between the substituent on boron and the hydrogen atoms on the pyrazolyl ring 5-position. The structure of [Cym B(Pz)3]Tl is somewhat related, but it adopts a macrocyclic tetrameric structure rather than a linear polymeric structure. Ligands with secondary donors on the backbone may form additional bonds to the thallium atom. For example, in [HB(3-(2-pyridyl)Pz)3]Tl, weak TF"N interactions between pyridyl nitrogens and the T1 atom have been observed. HB(3-(2-MeOC6Fl4)Pz)3]Tl features close intramolecular TF 0 interactions. ... [Pg.443]

The subphthalocyanine (SubPc) macrocycles have been received a great deal of attention because of their interesting optical properties and their utility in the synthesis of asymmetrical non-planar phthalocyanines " SubPc compounds consist of three coupled isoindole units with a boron atom at the centre. One component of this series is the sub-2,3-boronnaphthalocyanine chlorine (subBClNPc) compound, Figure 14.31. This compound has been considered in this chapter since it represents a new challenge in the optic of the surface vibrational studies because of the structure of this compound is conic, as in the case of the sub-2,3-boronphthalocyanine chlorine macrocycle, instead of the planar structure of the naphtalocyanine complexes already mentioned. ... [Pg.773]


See other pages where Boron Compounds with Macrocyclic Structures is mentioned: [Pg.537]    [Pg.3]    [Pg.179]    [Pg.14]    [Pg.221]    [Pg.362]    [Pg.301]    [Pg.254]    [Pg.463]    [Pg.178]    [Pg.8]    [Pg.42]    [Pg.436]    [Pg.176]    [Pg.435]    [Pg.63]    [Pg.819]    [Pg.1231]    [Pg.297]    [Pg.284]    [Pg.271]    [Pg.276]    [Pg.276]    [Pg.436]   


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Boron compounds

Boron compounds structure

Boron structure

Boron structures with

Boronates structure

Boronic structure

Macrocycles structures

Macrocyclic compounds, structure

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