• 𝑁-2,4-Dichlorobenzoyl phosphoric triamides: Synthesis, spectroscopic and X-ray crystallography studies

• # Fulltext

https://www.ias.ac.in/article/fulltext/jcsc/122/04/0549-0559

• # Keywords

Phosphoric triamides; NMR; long range coupling; X-ray crystallography; hydrogen bonds.

• # Abstract

New phosphoric triamides 1-9 were synthesized by the reaction of 𝑁-2,4-dichlorobenzoyl phosphoramidic dichloride with various cyclic aliphatic amines and the products were characterized by 1H, 13C, 31P NMR, IR spectroscopy and elemental analysis. Surprisingly, the 1H NMR spectrum of 2 indicated long range ${}^6J$ (P, H) coupling constant = 1.3, 1.4 Hz and those of molecules 3, 4, 6-8 display longrange ${}^4J$ (H, H) coupling constants ($1.8-1.9$ Hz) for the coupling of aromatic protons in 2,4-dichlorophenyl rings. 1H NMR spectra indicated ${}^3J$ (PNCH) for enantiotopic and diastereotopic benzylic CH2 protons in compounds 7 and 8. The spectroscopic data of newly synthesized compounds were compared with those related 𝑁-benzoyl derivatives. The structures of compounds 5, 8 and 10 (2,4-Cl2-C6H3C(O)NHP(O)[NCH2CH(CH3)2]2) have been determined by X-ray crystallography. The structures form centrosymmetric dimers through intermolecular strong -P=O…H-N-hydrogen bonds. The dimers connect to each other via rather strong and weak C-H…O plus weak C-H…Cl H-bonds to produce a 1-D network for 5 while 3-D polymeric chains for 8 and 10.

• # Author Affiliations

1. Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
2. Department of Chemistry, Amirkabir University of Technology, P. O. Box: 159163-4311, Tehran, Iran

• # Journal of Chemical Sciences

Volume 134, 2022
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019