Figure 1
Three different types of linear arrangement in compounds having an (N)P(O)(NH)2 skeleton (dashed lines indicate hydrogen bonds): (a) through P(O)⋯H—N hydrogen bonds, (b) via a PO⋯(H—N)(H—N) grouping, building R21(6) rings and (c) via a PO⋯(H—N)(H—N) group, building R22(8) rings. |