Šimuneková Mária, Schwendt Peter, Gyepes Róbert, Krivosudský Lukáš
Comenius University in Bratislava, Faculty of Natural Sciences, Department of Inorganic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia.
Charles University, Faculty of Science, Department of Inorganic Chemistry, Hlavova 2030, 128 00 Prague, Czech Republic.
J Chem Crystallogr. 2020;50(4):373-380. doi: 10.1007/s10870-019-00810-8. Epub 2019 Oct 17.
Two new 1D polymeric heterometallic copper-vanadium compounds were prepared. The polymers are constructed from [Cu()] cations that are coordinated to two terminal oxido ligands of [VO()] anions. The stronger coordination in [Cu()VO()] () that contains the racemic mandelato ligand is manifested by a shorter Cu‒O bond distance 2.4095(12) Å, while the weaker interaction in [Cu()(VO(()-))] ·2HO () is exhibited by Cu‒O bond distances 2.4547(16) Å and 2.5413(16) Å. The vanadate anion in compound carries only the ()-enantiomer of the initial mandelic acid and differs from the anion in in parallel orientation of the phenyl groups of the mandelato ligand. FT-IR spectroscopy was used for the confirmation of the coordination mode of mandelato ligand. Strong bands corresponding to the vibrations of carboxyl groups can be observed around 1650 and at 1344 cm. The stretching vibration of deprotonated hydroxyl group in the mandelato ligand occurs at 1045 and 1065 cm for and , respectively. In addition, the very strong, characteristic band corresponding to (V=O) vibration can be observed at 931 cm for and 925 cm for , as well as in Raman spectrum.
The polymeric structures of two new vanadium-copper heterometallic complexes are constructed from [Cu()] cations that are coordinated to two terminal oxido ligands of [VO()] anions with different orientation of the phenyl groups depending on the chirality of the mandelato ligand.
制备了两种新型一维聚合物异金属铜 - 钒化合物。这些聚合物由[Cu()]阳离子构建而成，该阳离子与[VO()]阴离子的两个末端氧化配体配位。在含有外消旋扁桃酸根配体的[Cu()VO()] ()中，较强的配位作用表现为较短的Cu‒O键距2.4095(12) Å，而在[Cu()(VO(()-))] ·2HO ()中较弱的相互作用则表现为Cu‒O键距为2.4547(16) Å和2.5413(16) Å。化合物 中的钒酸根阴离子仅携带初始扁桃酸的()-对映体，并且在扁桃酸根配体苯基的平行取向上与 中的阴离子不同。傅里叶变换红外光谱用于确认扁桃酸根配体的配位模式。在1650左右和1344 cm处可观察到对应羧基振动的强吸收带。对于 和 ，扁桃酸根配体中去质子化羟基的伸缩振动分别出现在1045和1065 cm处。此外，在931 cm处对于 和在925 cm处对于 ，以及在拉曼光谱中均可观察到对应(V = O)振动的非常强的特征吸收带。
两种新型钒 - 铜异金属配合物的聚合物结构由[Cu()]阳离子构建而成，该阳离子与[VO()]阴离子的两个末端氧化配体配位，苯基的取向因扁桃酸根配体的手性而异。
