(IUCr) Phosphonoacetic acid

Figure 5
Part of the crystal structure of (2), which shows the linking by C-H

O hydrogen bonds of [010] chains into a (103) sheet. The atoms marked with an asterisk (*), hash (#), dollar sign ($) or ampersand (&) are at the symmetry positions ( $[{{5}\over{2}}]$ - x, - $[{{1}\over{2}}]$ + y, $[{{1}\over{2}}]$ - z), ( $[{{5}\over{2}}]$ - x, $[{{1}\over{2}}]$ + y, $[{{1}\over{2}}]$ - z), (1 - x, 1 - y, 1 - z) and ( $[{{3}\over{2}}]$ + x, $[{{1}\over{2}}]$ - y, - $[{{1}\over{2}}]$ + z), respectively.