Np(CO2)4 is Protactinium structured and crystallizes in the tetragonal I-4 space group. The structure is zero-dimensional and consists of two Np(CO2)4 clusters. Np(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. C(1) is bonded in a bent 120 degrees geometry to one O(1) and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Np(1) and one C(1) atom. In the second O site, O(2) is bonded in an L-shaped geometry to one Np(1) and one C(1) atom.
Np(CO2)4 is Protactinium structured and crystallizes in the tetragonal I-4 space group. The structure is zero-dimensional and consists of two Np(CO2)4 clusters. Np(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. All Np(1)-O(1) bond lengths are 2.57 Å. All Np(1)-O(2) bond lengths are 2.39 Å. C(1) is bonded in a bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.26 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Np(1) and one C(1) atom. The O(1)-Np(1) bond length is 2.57 Å. The O(1)-C(1) bond length is 1.24 Å. In the second O site, O(2) is bonded in an L-shaped geometry to one Np(1) and one C(1) atom. The O(2)-Np(1) bond length is 2.39 Å. The O(2)-C(1) bond length is 1.26 Å.