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We have synthesized and exhibited a series of the sub- stituted,
saturated-PAHCr(CO)▋.In the process of synthesis, because the
PAHCr(CO)▋are difficult to be synthesized and low in yield,it
is a great disadvantage in the application of organic synthesis.
We have developed a modified synthetic way:the Cr(CO)▋L▋is
used instead of Cr(CO)▋,and the solvent system and reaction
temperature is changed.By the new synthetic way,we get a
product of higher yield on the synthesis of PAHCr(CO)▋.In a
series of substituted-PAH Cr(CO)▋compounds,we find it includes
high regio-selectivity.In this report,we search for the change
of the Cr(CO)▋group's coordination on the PAHCr(CO)▋.Besides
considering highest electronic density area,the electron factor
or steric factor of the substituted-PAH complex also affects
coordination of the Cr(CO)▋.The structures of these complexes
could be determined by analysis of proton NMR spectral data.On
the other hand,we express and judge the synthetic way and
result of the PAHCr(CO)▋by MNDO theory calculation. Besides,
the synthesis and reaction of PAH is an important part of
toxiology chemistry. Because of the electronic density
distribution on PAH,the reaction mostly happens on small parts
of the aromatic ring.And because of its high electronic
density, nucleophilic substitution reaction usually has the
great difficulty in the synthesis.When PAHs are bonds to Cr(CO)
▋, nucleophilic substitution reaction could take place in the
coordinated ring,it is because metals have the electron
withdrawing characteristics.It includes Nitration,Bromination,
Alkylation reactions,etc.The reaction can be done under normal
conditions,it doesn't need high temperature and high pressure.
It couldn't be accomplished by organic synthetic process
before, but now it can be done through organometallic
intermediates.And we hope to spread its practical factor to
general organic synthetic reactions.
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