Solvothermal synthesis and characterization of tris(ethylenediamine)nickel(II) hexaselenodistannate(IV)

Abstract

Key indicatorsSingle-crystal X-ray study T = 293 K Mean (C-C) = 0.006 Å Disorder in main residue R factor = 0.030 wR factor = 0.068 Data-to-parameter ratio = 21.0 For details of how these key indicators were automatically derived from the article, see

Synthesis and Crystal Structure of Ca(en)4Ca(en)3[Sn2Se6] and Ca(en)4Se4 in Superheated and Supercritical Ethylenediamine

“…The coordination environment of [Sn 2 Se 6 ] 4– anion showing the hydrogen bonding is depicted in Figure 3. The selenium atoms of each [Sn 2 Se 6 ] 4– anion have short distances with two Ca(en) 4 2+ and six Ca(en) 3 2+ complexes via hydrogen bonds with N ··· Se distances varying from 3.4557(1) to 3.9757(1) Å and the N–H ··· Se angles varying from 131.22 to 174.29° (see Supporting Information, Table S5), which are consistent with values reported in literature 28–30. The intermolecular hydrogen bond connections result in a three‐dimensional network of Ca(en) 4 2+ , Ca(en) 3 2+ and [Sn 2 Se 6 ] 4– .…”

Synthesis and structural characterization oftris(ethylenediamine)nickel(II) dichromate

“…Both compounds exhibit sharp signals in their powder pattern indicating their crystalline nature. The tris(ethylenediamine)nickel(II) dication has been used to stabilize other tetrahedral dianions like molybdate, tetrasulfidomolybdate, selenate, antimonate, and other dianionic compounds [52][53][54][55][56][57][58][59][60][61][62][63][64] (table 2). For the synthesis, [Ni(en) 3 ] 2þ was used as the starting material for product formation via cation exchange as in the present work or alternatively the [Ni(en) 3 ] 2þ dication was generated in situ under ambient conditions by using a nickel salt and (en) to stabilize the anion [59][60][61][62][63][64] [52][53][54][55][56][57].…”

Synthesis, crystal structures of [M(tepa)]2(μ2-Sn2Se6)(M=Fe and Co), showing a selenidostannate bridge for transition metal complex cations

“…The Sn1-Se1 distance (2.4839(7) Å ) is elongated comparing with that of the other Sn-Se t bond (2.4407(8) Å for Sn1-Se3). The distance is also slightly longer than that in [Ni(en) 3 ] 2 Sn 2 Se 6 (2.4603(5)-2.4717(4) Å ) [23], due to the interaction of the M-Se ionic bond. This phenomenon is in accordance with those found in corresponding [Sn 2 S 6 ] 4À bridge compounds [14,16].…”

“…Usually selenidostannates(IV) exist as an isolated [Sn 2 Se 6 ] 4À anion [15,23]. In addition, there are some significant weak hydrogen bonds in 1.…”