Water-Mg++ bond lengths

Allan Sharp allan at mycroft.mmid.ualberta.ca
Fri Aug 2 19:34:10 EST 1996


Yoram Puius (puius at aecom.yu.edu) wrote:
: Dear netters:

: I have a blob of electron density which I believe is a hydrated, hexa-
: coordinate Mg++ ion.  It is not physiologically relevant, and appears to be
: bound between the molecule and  symmetry mate.  It is strong Fo-Fc
: density, and looks like a square slab with bumps on top and bottom, i.e.
: octahedrally coordinated, and doesn't look much like any other solutes
: in the crystallization buffer.

: So here's my question:  Does anyone have the magnesium-water distances in
: solvated hexacoordinate Mg(II)?  I have tried a few references, and am not
: really sure where else to look.  Any method -- crystallography, solution
: spectroscopy, etc. -- would be great.

: Many thanks in advance,
: 	Yoram


: -- 
: _____________________________________________________________________________
: Yoram A. Puius                            Albert Einstein College of Medicine
: mailto://puius@aecom.yu.edu               Department of Biochemistry
: M.D.-Ph.D. student                        1300 Morris Park Avenue
: 5th year                                  Bronx, NY  10461
: _____________________________________________________________________________
: Life is the neverending struggle to properly titrate caffeine with beer.
: 						- Stephen K. Burley

You could search the Cambridge structural database for small molecules with
hydrated magnesiums and see what the measured distances are.

Allan M. Sharp




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