Related Experiment Video
Updated: Aug 30, 2026
![The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F54498.jpg&w=3840&q=50)
The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
Published on: November 28, 2016
Synthesis and characterization of HN(SPiPr2)(SePPh2) and [Te[N(SPiPr2)(SePPh2)]2]
1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA.
Abstract:
The compound HN(SP(i)Pr(2))(SePPh(2)) has been synthesized from the reaction of Ph(2)P(Se)NH(2) with (i)()Pr(2)P(S)Cl in the presence of NaH in THF. HN(SP(i)Pr(2))(SePPh(2)) crystallizes with eight formula units in space group Pbca of the orthorhombic system in a cell of dimensions at -120 degrees C of a = 9.9560(6) A, b = 17.9053(10) A, c = 22.4156(13) A, and V = 3995.9(4) A(3). The square-planar Te(II) complex [Te[N(SP(i)Pr(2))(SePPh(2))](2)] has been isolated from the reaction of Te(tu)(4)Cl(2) x 2H(2)O (tu = thiourea) with the anion [N(SP(i)Pr(2))(SePPh(2))](-), generated in situ from HN(SP(i)Pr(2))(SePPh(2)) in the presence of KO(t)Bu. [Te[N(SP(i)Pr(2))(SePPh(2))](2)] is dimorphic, crystallizing with one formula unit in space group P1 of the triclinic system in a cell of dimensions at -120 degrees C of a = 9.8476(9) A, b = 10.3296(9) A, c = 11.3429(10) A, alpha = 101.903(1) degrees, beta = 115.471(1) degrees, gamma = 92.281(2) degrees, and V = 1008.4(2) A(3) and also crystallizing with two formula units in space group P2(1)/n of the monoclinic system in a cell of dimensions at -120 degrees C of a = 8.7931(5) A, b = 17.1830(10) A, c = 14,1026(9) A, beta = 104.696(1) degrees, and V = 2061.1(2) A(3). In each instance, the [Te[N(SP(i)Pr(2))(SePPh(2))](2)] molecule possesses a center of symmetry, comprising a Te center liganded in a trans manner by two bidentate N(SP(i)Pr(2))(SePPh(2)) groups. However, the (31)P, (77)Se, and (125)Te NMR spectra of [Te[N(SP(i)Pr(2))(SePPh(2))](2)] show two sets of resonances at 25 degrees C. The (31)P VT NMR spectra show two sets of resonances between -50 and +50 degrees C that coalesce between 80 and 100 degrees C, consistent with the presence of the cis as well as the trans isomer in solution.
More Related Videos
Related Concept Videos
Preparation and Reactions of Sulfides
Hybridization of Atomic Orbitals I
Hybridization of Atomic Orbitals II
Chirality at Nitrogen, Phosphorus, and Sulfur
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...

