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Aminosilane bearing bulky substituents on nitrogen: LH2(L=Me2Si(NDipp-)2 , Dipp=2,6-diisopropylphenyl) was reacted with BuLi in toluene. The resulting bulky chelating dianion Me2Si(NDipp-)2 was used to synthesize the unusual spirocyclic heterotriatomic complex [Me2Si(NDipp)2]2Sn (1) by its reaction with SnCl4 and the bulky heterotriatomic complex Me2Si(NDipp)2SnPh2 (2) with Ph2SnCl2.1 belongs to the monoclinic system, space group P21/n with a=13.193(2), b=20.663(3), c=20.403(3), β=99.954(2)o, V=5478.3(15)3 , C55H85.5N4Si2Sn, Mr=977.64, Z=4, Dc=1.185Mg/m3 , μ(MoKα)=0.547mm-1 , F(000)=2086, S=1.000, the final R=0.0614 and wR=0.1322 for 14446 observed reflections (I>2σ(I)) and R=0.0797 and wR=0.1456 for all data. 2 belongs to the triclinic system, space group Pī with a=10.36(15), b=13.204(7), c=14.363(7), α=90.214(10), β=106.182(7), γ=109.854(8)o, V=1764.4(15)3 , C38H50N2SiSn, Mr=681.58, Z=2, Dc=1.283 Mg/m3 , μ(MoKα)=0.785 mm-1 , F(000)=712, S=1.002, the final R=0.0498 and wR=0.0955 for 7533 observed reflections (I>2σ(I)) and R=0.0676 and wR=0.1018 for all data. In the structure of 1, the tin atom is located in the spirocyclic center of the two fused four-membered SnN 2 Si rings. The two complexes were characterized by 1H NMR, elemental analysis, and single-crystal X-ray structural analysis.
The resulting bulky chelating dianion Me2Si (NDipp-) 2 was used to synthesize the unusual Spirocyclic heterotriatomic complex [Me2Si (NDipp) 2] 2Sn (1) by its reaction with SnCl4 and the bulky heterotriatomic complex Me2Si (NDipp) 2SnPh2 (2) with Ph2SnCl2.1 belongs to the monoclinic system, space group P21 / n with a = = 15.954 (2) o, V = 5478.3 (15) 3, C55H85.5N4Si2Sn, Mr = 977.64, Z = 4, Dc = 1.185 Mg / m3, μ (MoKα) = 0.547 mm -1, F (000) = 2086, S = 1.000, the final R = 0.0614 and wR = 0.1322 for 14446 observed reflections (I> 2σ (I)) and R = 0.0797 and wR = 0.1456 for all data. 2 belongs to the triclinic system, space group Pī with a = 10.36 (15), b = 13.204 (7), c = 14.363 (7) β = 106.182 (7), γ = 109.854 (8) o, V = 1764.4 (15) 3, C38H50N2SiSn, Mr = 681.58, Z = 2, Dc = 1.283 Mg / m3 and μ (MoKα) = 0.785 mm -1 , F (000) = 712, S = 1.002, the final R = 0.04 98 and wR = 0.0955 for 7533 observed reflections (I> 2σ (I)) and R = 0.0676 and wR = 0.1018 for all data. In the structure of 1, the tin atom is located in the spirocyclic center of the two fused four- membered SnN 2 Si rings. The two complexes were characterized by 1H NMR, elemental analysis, and single-crystal X-ray structural analysis.