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Two Rhod­amine Derivatives: 9-[2-(Ethoxycarbonyl)phenyl]-3,6-bis(ethyl­amino)-2,7-di­methyl­xanthyl­ium Chloride Monohydrate and 3,6-Di­amino-9-[2-(methoxy­carbonyl)­phenyl]xanthyl­ium Chloride Trihydrate by D. N. Adhikesavalu; Donald Mastropaolo; Arthur Camerman; Norman Camerman is a Chemistry article available to read on EtoBox.

What is Two Rhod­amine Derivatives: 9-[2-(Ethoxycarbonyl)phenyl]-3,6-bis(ethyl­amino)-2,7-di­methyl­xanthyl­ium Chloride Monohydrate and 3,6-Di­amino-9-[2-(methoxy­carbonyl)­phenyl]xanthyl­ium Chloride Trihydrate about?

The title compounds, C28H31N2O3(+)-Cl(-)-H2O (common name rhodamine-6g), (I), and C21H17N2O3(+)-Cl(-)-3H2O (common name rhodamine-123), (II), both have planar xanthene skeletons with a formal +1 charge on the amino N atoms delocalized through the pi-electron system so that the N-Csp(2) bond distances indicate significant double-bond character. The substituted planar phenyl groups make angles of 63.29 (8) and 87.96 (11) degrees with the xanthene planes in (I) and (II), respectively. In both molecules, the carbonyl bond vectors point toward the xanthene rings. The ethylamine groups in (I) are oriented similarly with their CH2-CH3 bond vectors pointing nearly perpendicular to the xanthene plane. The chloride ions and water molecules are disordered in both structures. In (I), the chloride ion and water molecule are disordered between two sites. One water and chloride alternately occupy the same site with occupancy factors of 0.5. The other 0.5-chloride and 0.5-water occupy two distinct positions separated by 0.747 (8) A. In (II), the chloride ion is disordered between three sites and one of the waters is disordered about two other sites. Both crystal structures are stabilized by hydrog

Who reads Two Rhod­amine Derivatives: 9-[2-(Ethoxycarbonyl)phenyl]-3,6-bis(ethyl­amino)-2,7-di­methyl­xanthyl­ium Chloride Monohydrate and 3,6-Di­amino-9-[2-(methoxy­carbonyl)­phenyl]xanthyl­ium Chloride Trihydrate?

Author

D. N. Adhikesavalu; Donald Mastropaolo; Arthur Camerman; Norman Camerman

Publisher

International Union of Crystallography; Blackwell Publishing Inc.; International Union of Crystallography (IUCr); Wiley (ISSN 0108-2701)

Published

2001

Language

EN

Field

Chemistry (Physical Sciences)