K₈[B₁₂(BSe₃)₆]: A Novel Selenoborato‐closo‐dodecaborate with Different Anion Substitution Patterns

Abstract

Systematic studies on selenoborates containing a B12 cluster entity and alkali metal cations led to the new crystalline phase K8[B12(BSe3)6] which consists of a icosahedral B12 cluster completely saturated with trigonal‐planar BSe3 units and potassium counter‐ions. For the first time three different anion substitution patterns are observed in one crystal structure. The new chalcogenoborate was prepared in a solid state reaction from potassium selenide, amorphous boron and selenium in evacuated carbon coated silica tubes at a temperature of 850 °C. K8[B12(BSe3)6] crystallizes in the monoclinic space group Cm (no. 8) with a = 16.288(2)Å, b = 41.617(4)Å, c = 9.788(1)Å, β = 109.59(1)°, and Z = 6.

KEu2In3B12S13: a novel type of thioborate featuring B12S12 cluster and unique In6S6 12-membered ring

“…4,10 According to their chemical compositions, most chalcogenoborates are ternary or quaternary, as reported by the wonderful studies of Krebs. 4,[11][12][13][14][15][16] In around recent ten years, there are only five studies addressing chalcogenoborates containing B 12 It is well known that borates are wonderful functional materials as either electrode materials for rechargeable batteries or second-order nonlinear optical (NLO) materials in the ultraviolet (UV) region. [20][21][22][23][24][25] On the other hand, chalcogenides are the most competitive candidates for NLO materials in the middle-infrared (MIR) region.…”

“…The B-B and In-S bond distances changed within 1.803(15)-1.816(10) Å and 2.646(2)-2.649(1) Å, respectively, which were close to those in other structures containing B 12 S 12 clusters. [10][11][12][13][14][15][16][17][18][19] Six B(1) and six B(2) atoms are connected with each other or themselves to form a B 12 icosahedron (Fig. 1a), and all the faces are planar triangles.…”

22 New compounds and structures in the solid state

“…137 Sr 3 (BS 3 ) 2 and Sr 3 (B 3 S 6 ) 2 contain isolated trigonal planar [BS 3 ] 32 and cyclic [B 3 S 6 ] 32 anions with strontium cations located between the anionic layers. 138 Six isotypic hexathio-and hexaseleno-hypodiphosphates respectively with the formula M 2 P 2 X 6 (M ~Ca, Sr, Eu, Ba; x ~S, Se) have been synthesised. The discrete ethanelike (P 2 X 6 ) 42 anions adopt a staggered conformation and are linked via X-M-X bonds to a three-dimensional structure containing Ca 21 , Sr 21 and Eu 21 ions and Ba 21 coordinated by 8 and 8 1 1 S and Se atoms respectively.…”

8 Oxygen, sulfur, selenium and tellurium

“…44 X-ray crystallographic studies show that the germanium centres reside in highly distorted tetrahedral geometries. Germanium chalcogenolates, (PhSe) 4 Ge and (PhTe) 4 Ge, have been prepared from the reaction of hydrogenated germanium and the corresponding diphenyldichalcogenide. The products are tetrahedral compounds and the tellurium analogue is the first example of a homoleptic organotellurolate of germanium.…”

“…The tin and germanium complexes possess two and three terminal MLSe bonds, respectively. The treatment of (SnNtBu) 4 with elemental sulfur or selenium afforded the monochalcogenated cubanes Sn 4 S(NtBu) 4 and Sn 4 Te(NtBu) 4 , respectively. 49 Finally for Group 14, the structure of a highly irregular 9-coordinate lead(II) complex has been reported for [Pb(1,4,7-trithiacyclodecane)(ClO 4 ) 2 (H 2 O)], 50 along with the synthesis of four new lead(II)-tellurium(IV)-oxide halides, Pb 3 Te 2 O 6 X 2 and Pb 3 TeO 4 X 2 (X ~Cl or Br).…”