Bridge cleavage of [{PhP(Se)(m-Se)}₂] by 1,2-C₆H₄(EH)(E'H) (E, E' = O or NH). X-ray crystal structure of PhP(Se)(NHC₆H₄NH-1,2)

Treatment of [{PhP(Se)(mu -Se)}(2)] (1), the oxidation product of (PhP), with excess selenium, with 2-aminophenol, 1,2-phenylenediamine, catechol or 3,4-diaminotoluene leads to the rupture of the dimer giving PhP(Se)NHC6H4O-1,2) (2), Ph-P(Se)(NHC6H4NH-1.2) (3), PhP(Se)(OC6H4O-1,2) (4) and PhP(Se)(NHC6H3(CH3-3)NH- 1,2) (5), respectively. In the molecular structure of 3, determined crystallographically. there are two independent molecules within the unit cell which are linked by P=Se . . .H-N hydrogen bonds, leading to chains of dimer pairs in the solid state. (C) 2001 Elsevier Science B.V. All rights reserved.