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Diaqua-(nitrato-κO,O')bis-(l-phenyl-alaninato-κO,O')lead(II) nitrate.

Bernès S, Gasque L - Acta Crystallogr Sect E Struct Rep Online (2008)

Bottom Line: Coordinated water mol-ecules are also found at significantly different distances, while the bidentate nitrate ion coordinates symmetrically.The resulting [Pb(II)O(8)] core is hemi-directed, with a void placed almost trans to a carboxyl-ate group.However, the 6s(2) lone pair of the metal center can not be considered as stereochemically active, as a non-coordinating O atom of a nitrate belonging to a symmetry-related cation is placed in the empty hemisphere, with a short Pb⋯O separation of 3.035 (10) Å.

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ABSTRACT
In the title complex, [Pb(C(9)H(11)NO(2))(2)(NO(3))(H(2)O)(2)]NO(3), the cation is a monomeric species including zwitterionic amino-acids. In both zwitterions, rotation of the NH(3) (+) groups about their C-N bonds is blocked by inter-molecular N-H⋯O hydrogen bonds. Assuming a limit for Pb-O bond lengths of 3 Å, the Pb(II) ion is coordinated by eight O atoms. Each phenyl-alaninate ligand coordinates asymmetrically, with one short and one long Pb-O bond. Coordinated water mol-ecules are also found at significantly different distances, while the bidentate nitrate ion coordinates symmetrically. The resulting [Pb(II)O(8)] core is hemi-directed, with a void placed almost trans to a carboxyl-ate group. However, the 6s(2) lone pair of the metal center can not be considered as stereochemically active, as a non-coordinating O atom of a nitrate belonging to a symmetry-related cation is placed in the empty hemisphere, with a short Pb⋯O separation of 3.035 (10) Å.

No MeSH data available.


Related in: MedlinePlus

The asymmetric unit of (I) showing the atom numbering scheme, with displacement ellipsoids at the 30% probability level.
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Fap1: The asymmetric unit of (I) showing the atom numbering scheme, with displacement ellipsoids at the 30% probability level.


Diaqua-(nitrato-κO,O')bis-(l-phenyl-alaninato-κO,O')lead(II) nitrate.

Bernès S, Gasque L - Acta Crystallogr Sect E Struct Rep Online (2008)

The asymmetric unit of (I) showing the atom numbering scheme, with displacement ellipsoids at the 30% probability level.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2961060&req=5

Fap1: The asymmetric unit of (I) showing the atom numbering scheme, with displacement ellipsoids at the 30% probability level.
Bottom Line: Coordinated water mol-ecules are also found at significantly different distances, while the bidentate nitrate ion coordinates symmetrically.The resulting [Pb(II)O(8)] core is hemi-directed, with a void placed almost trans to a carboxyl-ate group.However, the 6s(2) lone pair of the metal center can not be considered as stereochemically active, as a non-coordinating O atom of a nitrate belonging to a symmetry-related cation is placed in the empty hemisphere, with a short Pb⋯O separation of 3.035 (10) Å.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
In the title complex, [Pb(C(9)H(11)NO(2))(2)(NO(3))(H(2)O)(2)]NO(3), the cation is a monomeric species including zwitterionic amino-acids. In both zwitterions, rotation of the NH(3) (+) groups about their C-N bonds is blocked by inter-molecular N-H⋯O hydrogen bonds. Assuming a limit for Pb-O bond lengths of 3 Å, the Pb(II) ion is coordinated by eight O atoms. Each phenyl-alaninate ligand coordinates asymmetrically, with one short and one long Pb-O bond. Coordinated water mol-ecules are also found at significantly different distances, while the bidentate nitrate ion coordinates symmetrically. The resulting [Pb(II)O(8)] core is hemi-directed, with a void placed almost trans to a carboxyl-ate group. However, the 6s(2) lone pair of the metal center can not be considered as stereochemically active, as a non-coordinating O atom of a nitrate belonging to a symmetry-related cation is placed in the empty hemisphere, with a short Pb⋯O separation of 3.035 (10) Å.

No MeSH data available.


Related in: MedlinePlus