Synthesis and Structures of Intramolecularly Base-Coordinated Aryl Group 15 Compounds

Several group 15 compounds of the type EAr 3 (Ar = 2-[(dimethylamino)methyl]phenyl; E = As ( 4 ), Sb ( 5 ), Bi ( 6 )) have been prepared via salt elimination reactions of 2-(Me 2 NCH 2 )C 6 H 4 Li and ECl 3 . Treatment of the lithium salt of the 8-(dimethylamino)-1-naphthyl ligand (Ar‘) with AsCl 3 afforded a triaryl derivative, AsAr‘ 3 ( 7 ). The X-ray crystal structures of 4 − 7 are described, and the observed trends in the degree of intramolecular coordination of the nitrogen atoms are discussed. Crystal data for 4: monoclinic, space group P 2 1 / c, a = 8.9336(6) Å, b = 16.347(2) Å, c = 17.875(2) Å, β = 102.540(7)°, V = 2548.2(4) Å 3, Z = 4, R = 0.0579. Crystal data for 5: monoclinic, space group P 2 1, a = 9.288(2) Å, b = 18.356(4) Å, c = 15.566(2) Å, β = 90.28(2)°, V = 2654.1(8) Å 3, Z = 4, R = 0.0520. Crystal data for 6: monoclinic, space group P 2 1, a = 9.2996(12) Å, b = 18.445(3) Å, c = 15.601(2) Å, β = 90.076(11)°, V = 2676.1(7) Å 3, Z = 4, R = 0.0783. Crystal data for 7: monoclinic, space group P 2 1 / c, a = 9.5744(12) Å, b = 16.273(2) Å, c = 18.884(3) Å, β = 100.708(11)°, V = 2890.9(7) Å 3, Z = 4, R = 0.0495.