| Abstract
| - The first dialkyltellurium(IV) diazides, R2Te(N3)2, and alkyl- and aryltellurium(IV) triazides, RTe(N3)3, have been synthesized and fully characterized. Single-crystal X-ray studies of the triazides display various intermolecular Te···N contacts. The structures and vibrational data of the smallest members, the methyl derivatives (CH3)2Te(N3)2 and CH3Te(N3)3, have been calculated and compared with the observed vibrational spectra.
- New series dialkyltellurium(IV) diazides R2Te(N3)2 (R = CH3 (6), C2H5 (7), n-C3H7 (8), i-C3H7 (9), c-C6H11 (10)) andalkyl/aryltellurium(IV) triazides R‘Te(N3)3 (R‘ = CH3 (11), C2H5 (12), n-C3H7 (13), i-C3H7 (14), C6H5 (15), 2,4,6-(CH3)3C6H2 (16)) were synthesized by the straightforward substitution of fluorine atoms in the corresponding telluriumdifluorides, or trifluorides respectively, with trimethylsilyl azide. In addition to standard characterization methods,the first crystal structures of covalent organotellurium(IV) triazides 12, 13, 14, and 16 have been determined.Ethyltellurium(IV) triazide, C2H5Te(N3)3 (12), crystallizes in the monoclinic space group P21/n, a = 8.4530(2) Å, b= 7.9094(2) Å, c = 12.6288(3) Å, β = 91.876(1)°. n-Propyltellurium(IV) triazide, n-C3H7Te(N3)3 (13), crystallizesin the monoclinic space group P21/n as well, a = 8.7999(2) Å, b = 7.9674(2) Å, c = 13.2334(3) Å, β = 94.626(1)°.Isopropyltellurium(IV) triazide, i-C3H7Te(N3)3 (14), crystallizes in the monoclinic space group C2/c, a = 20.058(2)Å, b = 6.9620(3) Å, c = 15.030(1) Å, β = 114.260(9)°. Mesityltellurium(IV) triazide, 2,4,6-(CH3)3C6H2Te(N3)3 (16),crystallizes monoclinic as well; the space group is P21/c, a = 7.5503(6) Å, b = 23.581(1) Å, c = 7.5094(6) Å, β= 91.295(9)°. The structures and vibrational frequencies of the methyl derivatives dimethyltellurium(IV) diazide (6)and methyltellurium(IV) triazide (11) have been calculated by density functional theory methods and were comparedwith the experimental metric parameters and vibrational data.
|
