K2C7N4O crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one N(1), two equivalent N(4), three equivalent N(2), and one O(1) atom. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent N(1), three equivalent N(3), and two equivalent O(1) atoms. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted linear geometry to one C(2) and one N(1) atom. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(7) atom. In the third C site, C(3) is bonded in a distorted linear geometry to one C(4) and one N(2) atom. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(6) atom. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one O(1) atom. In the sixth C site, C(6) is bonded in a distorted linear geometry to one C(4) and one N(4) atom. In the seventh C site, C(7) is bonded in a distorted linear geometry to one C(2) and one N(3) atom. There are four inequivalent N sites. In the first N site, N(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), two equivalent K(2), and one C(1) atom. In the second N site, N(2) is bonded to three equivalent K(1) and one C(3) atom to form a mixture of distorted corner and edge-sharing NK3C trigonal pyramids. In the third N site, N(3) is bonded in a 4-coordinate geometry to three equivalent K(2) and one C(7) atom. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to two equivalent K(1) and one C(6) atom. O(1) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one C(5) atom.
K2C7N4O crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one N(1), two equivalent N(4), three equivalent N(2), and one O(1) atom. The K(1)-N(1) bond length is 3.07 Å. There is one shorter (2.80 Å) and one longer (2.88 Å) K(1)-N(4) bond length. There are a spread of K(1)-N(2) bond distances ranging from 2.90-2.95 Å. The K(1)-O(1) bond length is 3.06 Å. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent N(1), three equivalent N(3), and two equivalent O(1) atoms. There is one shorter (2.99 Å) and one longer (3.02 Å) K(2)-N(1) bond length. There are a spread of K(2)-N(3) bond distances ranging from 2.89-3.19 Å. There is one shorter (2.89 Å) and one longer (2.94 Å) K(2)-O(1) bond length. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted linear geometry to one C(2) and one N(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-N(1) bond length is 1.18 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(7) atom. The C(2)-C(5) bond length is 1.46 Å. The C(2)-C(7) bond length is 1.40 Å. In the third C site, C(3) is bonded in a distorted linear geometry to one C(4) and one N(2) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-N(2) bond length is 1.18 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(6) atom. The C(4)-C(5) bond length is 1.45 Å. The C(4)-C(6) bond length is 1.40 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one O(1) atom. The C(5)-O(1) bond length is 1.28 Å. In the sixth C site, C(6) is bonded in a distorted linear geometry to one C(4) and one N(4) atom. The C(6)-N(4) bond length is 1.18 Å. In the seventh C site, C(7) is bonded in a distorted linear geometry to one C(2) and one N(3) atom. The C(7)-N(3) bond length is 1.18 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), two equivalent K(2), and one C(1) atom. In the second N site, N(2) is bonded to three equivalent K(1) and one C(3) atom to form a mixture of distorted corner and edge-sharing NK3C trigonal pyramids. In the third N site, N(3) is bonded in a 4-coordinate geometry to three equivalent K(2) and one C(7) atom. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to two equivalent K(1) and one C(6) atom. O(1) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one C(5) atom.