Is the previously described N-phenyl 4,5-benzo 1,3,2-diazaphosphole a dicoordinated phosphorus compound ?

Article abstract of DOI:10.1016/S0040-4020(01)81293-X

Dicoordinated Phosphorus; 1,3,2-Diazaphospholes; Cyclotetraphosphazanes. The N-phenyl 4,5-benzo 1,3,2-diazaphosphole 1 cannot be isolated free but can be identified in complexed form. It polymerizes and gives first a cyclotetraphosphazane, then quickly a