ORGLIST: Circular dichroism problem

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From: J.Aires de Sousa (jas$##$mail.fct.unl.pt)
Date: Mon Aug 06 2001 - 09:15:06 EDT




-------- Original Message --------
From: A De <ocad$##$mahendra.iacs.res.in>
To: "Dr J.a.deSousa" <jas$##$mail.fct.unl.pt>



Can any one suggest?

Recently, I synthesized a water soluble
polymeric coordination compound. X-ray
crystallography has established this molecule
to have a single stranded helical structure
with centrosymmetric space group, P21/c
(No. 14), Z = 4. In solution (water or
methanol as solvent) the same compound
shows circular dichroism (CD active).
        My question is whether a molecule
with centrosymmetric space group in the
crystalline state can be CD active in solution?
It is expected that a centrosymmetric crystal
will produce the right-handed and left-handed
helicates in identical number and the solution
of such crystal will be a recimic mixture.
        Thank you for your atention in advance.

        Sincerely,
        Ashis De



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