title: Novel organotellurium(IV) diazides and triazides.
abstract: New series dialkyltellurium(IV) diazides R(2)Te(N(3))(2) (R = CH(3) (6), C(2)H(5) (7), n-C(3)H(7) (8), i-C(3)H(7) (9), c-C(6)H(11) (10)) and alkyl/aryltellurium(IV) triazides R'Te(N(3))(3) (R' = CH(3) (11), C(2)H(5) (12), n-C(3)H(7) (13), i-C(3)H(7) (14), C(6)H(5) (15), 2,4,6-(CH(3))(3)C(6)H(2) (16)) were synthesized by the straightforward substitution of fluorine atoms in the corresponding tellurium difluorides, 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, C(2)H(5)Te(N(3))(3) (12), crystallizes in the monoclinic space group P2(1)/n, a = 8.4530(2) A, b = 7.9094(2) A, c = 12.6288(3) A, beta = 91.876(1). n-Propyltellurium(IV) triazide, n-C(3)H(7)Te(N(3))(3) (13), crystallizes in the monoclinic space group P2(1)/n as well, a = 8.7999(2) A, b = 7.9674(2) A, c = 13.2334(3) A, beta = 94.626(1). Isopropyltellurium(IV) triazide, i-C(3)H(7)Te(N(3))(3) (14), crystallizes in the monoclinic space group C2/c, a = 20.058(2) A, b = 6.9620(3) A, c = 15.030(1) A, beta = 114.260(9). Mesityltellurium(IV) triazide, 2,4,6-(CH(3))(3)C(6)H(2)Te(N(3))(3) (16), crystallizes monoclinic as well; the space group is P2(1)/c, a = 7.5503(6) A, b = 23.581(1) A, c = 7.5094(6) A, beta = 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 compared with the experimental metric parameters and vibrational data.
authors.affiliation: Department of Chemistry, Ludwig-Maximilians University of Munich, Butenandtstrasse 5-13 (D), D-81377 Munich, Germany. thomas.m.klapoetke@cup.uni-muenchen.de
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Klapötke
authors.forename: Burkhard
authors.initials: B
authors.lastname: Krumm
authors.forename: Peter
authors.initials: P
authors.lastname: Mayer
authors.forename: Holger
authors.initials: H
authors.lastname: Piotrowski
authors.forename: Oliver P
authors.initials: OP
authors.lastname: Ruscitti
authors.forename: Alexander
authors.initials: A
authors.lastname: Schiller