Access the full text.
Sign up today, get DeepDyve free for 14 days.
References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.
Several phosphoric triamides with formula C6H5C(O)N(H)P(O)X2, X = N(C2H5)(CH2C6H5) (1), NC4H8 (2), NH-CH2-C6H5 (3), NH-CH2-(2-Cl-C6H4) (4), NH-CH2-CH(C2H5)(C4H9) (5), N(C2H5)2 (6) and P(O)(NH-CH2-C6H5)3 (7) were synthesized and characterized by 1 H, 13 C, 31 P NMR and IR spectroscopy and elemental analysis. The structures were determined for compounds 3, 7 and 36, 4-F-C6H4C(O)NHP(O)(NH-CH2-CH=CH2)2. In compound 3, there are intermolecular -P=O … H-N- and -C=O … H-N- hydrogen bonds which form a one-dimensional polymeric chain. Compound 7 contains intermolecular -P=O … H-N- hydrogen bonds leading to a one-dimensional polymeric chain. Compound 36 forms intermolecular -P=O … H-N-, -C=O … H-N- and -C-F … H-N- hydrogen bonds which produce a three-dimensional polymeric chain in the crystalline network. The effects of rotation, ring inversion, temperature and solvent on the coupling patterns of the CH2 protons in 1 H NMR spectra were discussed. The Gibbs free energy for the rotation around the P-N bond in compounds 3, 6 and 41, (4-CH3-C6H4-O)P(O)Cl(N(CH3)(CH2C6H5)), were calculated from dynamic 1 H NMR spectra at low temperatures. The ΔG # value for compound 3 is the greatest one among these molecules. The crystal structures of compounds 3 and 6 indicates that the slightly smaller P-Namine bond lengths in 3 relative to 6 cause a greater ΔG # value in 3.
Main Group Chemistry – IOS Press
Published: Jan 1, 2006
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.