TY - JOUR

T1 - Synthesis, Structure, and Properties of Asymmetric Fluorinated Magnesium β-Diketonate Complexes

AU - Krutskikh, S. S.

AU - Kochelakov, D. V.

AU - Nazarova, A. A.

AU - Korolkov, I. V.

AU - Zelenina, L. N.

AU - Vikulova, E. S.

PY - 2024/11

Y1 - 2024/11

N2 - Abstract: New complexes of magnesium with asymmetric fluorinated β-diketones are synthesized: pentafluoropropionyl (Hpfpac, 6,6,6,5,5-pentafluorohexane-2,4-dione) and heptafluorobutyrylacetone (Hhfbac, 7,7,7,6,6,5,5-heptafluoroheptane-2,4-dione). The [Mg(H2O)(EtOH)(pfpac)2] 1 and [Mg(H2O)2(hfbac)2]·H2O 2 phases are characterized by a number of methods. The structures of crystals of 1, 2, and [Mg(EtOH)2(hfbac)2] 3 are determined by the single crystal X-ray diffraction analysis. Magnesium atoms have a distorted octahedral environment, and neutral ligands are in the trans-position. Molecules are involved in systems of OH⋯Odik hydrogen bonds, forming layers (2) or chains (1, 3). A relative evaluation shows that 2 is more volatile than 1. Structures of molecules and packing characters are compared with those of a series of related β-diketonate complexes. The effect of an increase in the ligand perfluoroalkyl chain (L = tfac, trifluoroacetylacetonate ion), including isoformular [Mg(H2O)2(L)2]·H2O, is shown.

AB - Abstract: New complexes of magnesium with asymmetric fluorinated β-diketones are synthesized: pentafluoropropionyl (Hpfpac, 6,6,6,5,5-pentafluorohexane-2,4-dione) and heptafluorobutyrylacetone (Hhfbac, 7,7,7,6,6,5,5-heptafluoroheptane-2,4-dione). The [Mg(H2O)(EtOH)(pfpac)2] 1 and [Mg(H2O)2(hfbac)2]·H2O 2 phases are characterized by a number of methods. The structures of crystals of 1, 2, and [Mg(EtOH)2(hfbac)2] 3 are determined by the single crystal X-ray diffraction analysis. Magnesium atoms have a distorted octahedral environment, and neutral ligands are in the trans-position. Molecules are involved in systems of OH⋯Odik hydrogen bonds, forming layers (2) or chains (1, 3). A relative evaluation shows that 2 is more volatile than 1. Structures of molecules and packing characters are compared with those of a series of related β-diketonate complexes. The effect of an increase in the ligand perfluoroalkyl chain (L = tfac, trifluoroacetylacetonate ion), including isoformular [Mg(H2O)2(L)2]·H2O, is shown.

KW - complexes of fluorinated β-diketonates

KW - hydrogen bonds

KW - magnesium

KW - single crystal X-ray diffraction analysis

KW - volatility

KW - β-diketonate

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85211165681&origin=inward&txGid=30252d3b078f462816d81e9e4375292e

UR - https://www.mendeley.com/catalogue/c826f1d8-9db4-39ba-ab93-b7b849551d3c/

U2 - 10.1134/S0022476624110131

DO - 10.1134/S0022476624110131

M3 - Article

VL - 65

SP - 2260

EP - 2271

JO - Journal of Structural Chemistry

JF - Journal of Structural Chemistry

SN - 0022-4766

IS - 11

ER -