The material described by C5H4O2 is Indium-like structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two methyl methacrylate molecules. There are five inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(4) and one H(1) atom. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(3) atom. In the fifth C site, C(5) is bonded in a distorted trigonal non-coplanar geometry to one H(3), one H(4), and one O(1) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one C(3) and one C(5) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(3) atom. is represented by the CIF file [CIF]
data_H4C5O2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.580
_cell_length_b   6.002
_cell_length_c   9.120
_cell_angle_alpha   95.137
_cell_angle_beta   101.658
_cell_angle_gamma   111.981
_symmetry_Int_Tables_number   1
_cell_volume   223.862
_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
  H  H0  1  0.098  0.075  0.389  1.0
  H  H1  1  0.902  0.925  0.611  1.0
  H  H2  1  0.466  0.845  0.376  1.0
  H  H3  1  0.534  0.155  0.624  1.0
  H  H4  1  0.614  0.265  0.968  1.0
  H  H5  1  0.386  0.735  0.032  1.0
  H  H6  1  0.322  0.135  0.073  1.0
  H  H7  1  0.678  0.865  0.927  1.0
  C  C8  1  0.273  0.261  0.438  1.0
  C  C9  1  0.727  0.739  0.562  1.0
  C  C10  1  0.481  0.695  0.432  1.0
  C  C11  1  0.519  0.305  0.568  1.0
  C  C12  1  0.986  0.421  0.232  1.0
  C  C13  1  0.014  0.579  0.768  1.0
  C  C14  1  0.251  0.456  0.369  1.0
  C  C15  1  0.749  0.544  0.631  1.0
  C  C16  1  0.536  0.128  0.040  1.0
  C  C17  1  0.464  0.872  0.960  1.0
  O  O18  1  0.796  0.181  0.176  1.0
  O  O19  1  0.204  0.819  0.824  1.0
  O  O20  1  0.943  0.589  0.177  1.0
  O  O21  1  0.057  0.411  0.823  1.0
[/CIF]
.
The material described by C5H4O2 is Indium-like structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two methyl methacrylate molecules. There are five inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(4) and one H(1) atom. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(3) atom. In the fifth C site, C(5) is bonded in a distorted trigonal non-coplanar geometry to one H(3), one H(4), and one O(1) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one C(3) and one C(5) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(3) atom. is represented by the CIF file [CIF]
data_H4C5O2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.580
_cell_length_b   6.002
_cell_length_c   9.120
_cell_angle_alpha   95.137
_cell_angle_beta   101.658
_cell_angle_gamma   111.981
_symmetry_Int_Tables_number   1
_cell_volume   223.862
_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
  H  H0  1  0.098  0.075  0.389  1.0
  H  H1  1  0.902  0.925  0.611  1.0
  H  H2  1  0.466  0.845  0.376  1.0
  H  H3  1  0.534  0.155  0.624  1.0
  H  H4  1  0.614  0.265  0.968  1.0
  H  H5  1  0.386  0.735  0.032  1.0
  H  H6  1  0.322  0.135  0.073  1.0
  H  H7  1  0.678  0.865  0.927  1.0
  C  C8  1  0.273  0.261  0.438  1.0
  C  C9  1  0.727  0.739  0.562  1.0
  C  C10  1  0.481  0.695  0.432  1.0
  C  C11  1  0.519  0.305  0.568  1.0
  C  C12  1  0.986  0.421  0.232  1.0
  C  C13  1  0.014  0.579  0.768  1.0
  C  C14  1  0.251  0.456  0.369  1.0
  C  C15  1  0.749  0.544  0.631  1.0
  C  C16  1  0.536  0.128  0.040  1.0
  C  C17  1  0.464  0.872  0.960  1.0
  O  O18  1  0.796  0.181  0.176  1.0
  O  O19  1  0.204  0.819  0.824  1.0
  O  O20  1  0.943  0.589  0.177  1.0
  O  O21  1  0.057  0.411  0.823  1.0
[/CIF]
.