Magnesium, calcium and strontium salts of phenylacetic acid.
Three alkaline earth metal salts of phenylacetic acid were examined and all were found to have similar structural types to analogous salts of benzoic and halobenzoic acids. Thus, a synchrotron study shows that the cations in catena-poly[[[tetraaquamagnesium(II)]-μ-phenylacetato-κ(2)O:O'] phenylacetate], {[Mg(C(8)H(7)O(2))(H(2)O)(4)](C(8)H(7)O(2))}(n), form a one-dimensional coordination polymer that propagates through Mg-O-C-O-Mg interactions involving both crystallographically independent Mg centres (Z' = 2) and through translation along the a axis. The polymeric chains pack to give alternate inorganic layers and organic bilayers. The Ca and Sr species catena-poly[[[diaqua(phenylacetato-κ(2)O,O')calcium(II)]-μ(3)-phenylacetato-1':1:1''κ(4)O:O,O':O'] monohydrate], {[Ca(C(8)H(7)O(2))(2)(H(2)O)(2)]·H(2)O}(n), and catena-poly[[[diaqua(phenylacetato-κ(2)O,O')strontium(II)]-μ(3)-phenylacetato-1':1:1''κ(4)O:O,O':O'] monohydrate], {[Sr(C(8)H(7)O(2))(2)(H(2)O)(2)]·H(2)O}(n), are essentially isostructural. Both form one-dimensional coordination polymers through a carboxylate group that forms four M-O bonds. The polymeric chains propagate via 2(1) screw axes parallel to the b axis and are further linked in the bc plane by hydrogen bonding involving the non-metal-bound water molecule. Similarly to the Mg salt, both have inorganic layers that alternate with organic bilayers.
Department of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, Scotland.
Jean Baptiste
JB
Arlin
Alan R
AR
Kennedy
Kenneth
K
Shankland
D002118:Calcium / Q000737:chemistry*; D002412:Cations / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008274:Magnesium / Q000737:chemistry*; D008673:Metals, Alkaline Earth / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010648:Phenylacetates / Q000737:chemistry*; D012492:Salts / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*
D002412:Cations; D008673:Metals, Alkaline Earth; D009942:Organometallic Compounds; D010648:Phenylacetates; D012492:Salts; C025136:phenylacetic acid; D008274:Magnesium; D002118:Calcium; D013324:Strontium