The crystal structure described by Rb2C2H2O5 crystallizes in the monoclinic C2/c space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent H(1), one O(3), three equivalent O(1), and four equivalent O(2) atoms. C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. H(1) is bonded in a single-bond geometry to two equivalent Rb(1) and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to four equivalent Rb(1) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to two equivalent Rb(1) and two equivalent H(1) atoms. is represented by the CIF file [CIF]
data_Rb2H2C2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.834
_cell_length_b   5.834
_cell_length_c   11.107
_cell_angle_alpha   74.692
_cell_angle_beta   74.692
_cell_angle_gamma   67.632
_symmetry_Int_Tables_number   1
_cell_volume   331.532
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Rb  Rb0  1  0.050  0.690  0.630  1.0
  Rb  Rb1  1  0.310  0.950  0.870  1.0
  Rb  Rb2  1  0.690  0.050  0.130  1.0
  Rb  Rb3  1  0.950  0.310  0.370  1.0
  H  H4  1  0.570  0.346  0.698  1.0
  H  H5  1  0.654  0.430  0.802  1.0
  H  H6  1  0.346  0.570  0.198  1.0
  H  H7  1  0.430  0.654  0.302  1.0
  C  C8  1  0.442  0.084  0.553  1.0
  C  C9  1  0.916  0.558  0.947  1.0
  C  C10  1  0.084  0.442  0.053  1.0
  C  C11  1  0.558  0.916  0.447  1.0
  O  O12  1  0.597  0.140  0.593  1.0
  O  O13  1  0.206  0.150  0.593  1.0
  O  O14  1  0.522  0.478  0.750  1.0
  O  O15  1  0.850  0.794  0.907  1.0
  O  O16  1  0.860  0.403  0.907  1.0
  O  O17  1  0.140  0.597  0.093  1.0
  O  O18  1  0.150  0.206  0.093  1.0
  O  O19  1  0.478  0.522  0.250  1.0
  O  O20  1  0.794  0.850  0.407  1.0
  O  O21  1  0.403  0.860  0.407  1.0
[/CIF]
.
The crystal structure described by Rb2C2H2O5 crystallizes in the monoclinic C2/c space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent H(1), one O(3), three equivalent O(1), and four equivalent O(2) atoms. C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. H(1) is bonded in a single-bond geometry to two equivalent Rb(1) and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to four equivalent Rb(1) and one C(1) atom. In the third O site, O(3) is bonded in a water-like geometry to two equivalent Rb(1) and two equivalent H(1) atoms. is represented by the CIF file [CIF]
data_Rb2H2C2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.834
_cell_length_b   5.834
_cell_length_c   11.107
_cell_angle_alpha   74.692
_cell_angle_beta   74.692
_cell_angle_gamma   67.632
_symmetry_Int_Tables_number   1
_cell_volume   331.532
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Rb  Rb0  1  0.050  0.690  0.630  1.0
  Rb  Rb1  1  0.310  0.950  0.870  1.0
  Rb  Rb2  1  0.690  0.050  0.130  1.0
  Rb  Rb3  1  0.950  0.310  0.370  1.0
  H  H4  1  0.570  0.346  0.698  1.0
  H  H5  1  0.654  0.430  0.802  1.0
  H  H6  1  0.346  0.570  0.198  1.0
  H  H7  1  0.430  0.654  0.302  1.0
  C  C8  1  0.442  0.084  0.553  1.0
  C  C9  1  0.916  0.558  0.947  1.0
  C  C10  1  0.084  0.442  0.053  1.0
  C  C11  1  0.558  0.916  0.447  1.0
  O  O12  1  0.597  0.140  0.593  1.0
  O  O13  1  0.206  0.150  0.593  1.0
  O  O14  1  0.522  0.478  0.750  1.0
  O  O15  1  0.850  0.794  0.907  1.0
  O  O16  1  0.860  0.403  0.907  1.0
  O  O17  1  0.140  0.597  0.093  1.0
  O  O18  1  0.150  0.206  0.093  1.0
  O  O19  1  0.478  0.522  0.250  1.0
  O  O20  1  0.794  0.850  0.407  1.0
  O  O21  1  0.403  0.860  0.407  1.0
[/CIF]
.