Abstract

The structural features of eleven mononuclear octahedral monooxo [d²-Re(V)] complexes \(\left[ {{\text{ReO}}\left( {{\text{L}}_{{{\text{penta}}}}^{n}} \right)} \right]\) with pentadentate chelate ligands (3О, 2N), (2O, 3N), (2O, 2N, P), (2O, 2N, S), and (O, 2N, 2S) have been discussed. The О\(\left( {{\text{L}}_{{{\text{penta}}}}^{n}} \right)\) atoms are always located in trans positions to multiply bonded O(oxo) ligands. It has been found that in nine compounds with negatively charged oxygen atoms of ligands \({\text{L}}_{{{\text{penta}}}}^{n}\) in trans positions to multiply bonded O(oxo) ligands, the Re–O(L)_trans bonds (1.960–2.065 Å) are comparable in length, somewhat longer or noticeably shorter than Re–O(L)_cis (1.952–2.140 Å). These Re–O(L) bonds in trans positions to oxo ligands can be considered as having an increased multiplicity, since they are comparable in length (rather than elongated because of the structural manifestation of the trans-effect of the oxo ligand) with the Re–O(L)_cis distances. In this case, we can speak of pseudodioxo complexes containing two ligands (O(oxo) and O(L_trans)) with an increased order of the Re–O bonds (~2.5 and ~1.5 Å, respectively). In the other two complexes, the Re–O(L_penta)_trans bonds (2.200 and 2.252 Å) are significantly elongated. In these two cases, we should talk about the structural manifestation of the trans-effect of the multiply linked oxo ligand.

中文翻译：

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单体八面体 Monooxo d 2-铼(V) 配合物的晶体结构 [ReO( $${\text{L}}}_{{{\text{penta}}}}^{n}$$ )] 含氧五齿螯合配体

摘要

十一个单核八面体单氧合 [ d ² -Re(V)] 配合物的结构特征\(\left[ {{\text{ReO}}\left( {{\text{L}}_{{{\text{penta }}}}^{n}} \right)} \right]\)与五齿螯合配体 (3О, 2N), (2O, 3N), (2O, 2N, P), (2O, 2N, S),和 (O, 2N, 2S) 已经讨论过。О \(\left( {{\text{L}}_{{{\text{penta}}}}}^{n}} \right)\)原子总是位于反式位置以乘以键合的 O(oxo ) 配体。已经发现，在九种化合物中，配体\({\text{L}}_{{{\text{penta}}}}^{n}\)的配体的负电荷氧原子处于反式位置以乘以键合的 O( oxo) 配体，Re-O(L)_反式键 (1.960–2.065 Å) 的长度相当，比 Re-O(L)_顺式(1.952–2.140 Å)长一些或明显短一些。这些 Re-O(L) 键在与氧代配体的反式位置上可以被认为具有增加的多样性，因为它们的长度相当（而不是由于氧代配体的反式效应的结构表现而被拉长）与Re-O(L)_顺式距离。在这种情况下，我们可以说包含两个配体（O(oxo) 和 O(L _trans )）的假二氧杂环合物，其 Re-O 键的顺序增加（分别为~2.5 和~1.5 Å）。在另外两个配合物中，Re-O(L _penta ) _trans键（2.200 和 2.252 Å）显着拉长。在这两种情况下，我们应该谈谈多重连接的氧代配体的反式效应的结构表现。