Abstract
A series of ten rhenium tricarbonyl complexes (C1-C10), bearing halogen-substituted bidentate N,N-donor ligands with halogens or trifluoromethyl groups (X = -F, -Cl, -Br, and -CF 3) in different positions on the aromatic rings were synthesized and characterized by FT-IR and 1H-NMR spectroscopy and their solid-state structures were determined by single crystal X-ray diffraction. The resultant complexes Re(CO) 3(N,N)X display an octahedral coordination geometry around the central Re atom, and in all the complexes the Re(CO) 3 unit adopts a fac geometry. The metal-bound halogen atoms along with the halogen-substituted ligands were used to fine-tune the electron density of the halogen σ-hole on the coordinated halide that is involved in halogen-halogen and other intermolecular interactions. This series of compounds was used to explore the range of possible intermolecular interactions involving rhenium coordinated halides. These supramolecular interactions include: (i) halogen bonding through the metal-bound halogen with the carbon-bound halogen (Re-X⋯X-C), (ii) halogen bonding through the carbon-bound halogen with another carbon-bound halogen (C-X⋯X-C), (iii) dipolar interactions through carbonyl-carbonyl (CO⋯CO), (iv) C-H⋯X hydrogen bonding interactions, (v) C-H⋯O hydrogen bonding interactions, (vi) halogen (X)⋯heteroatom (N, O) interactions and (vii) metal-bond carbonyl lone pair with aromatic π-ring interaction, Re-CO(lone pair)⋯π(aromatic ring). In each case the molecular electrostatic potential and non-covalent interaction index were calculated. Crystal packing analyses using Hirshfeld surface calculation confirmed that metal-bound halogen is more effective than carbon-bound halogen in the formation of intermolecular interactions. Complexes C8 and C10 featured interesting intramolecular Re-CO(lone pair)⋯π interactions, the presence of which were confirmed by molecular orbital and non-covalent interaction index (NCI) calculations.
| Original language | English |
|---|---|
| Pages (from-to) | 77-93 |
| Number of pages | 17 |
| Journal | CrystEngComm |
| Volume | 21 |
| Issue number | 1 |
| Early online date | 4 Dec 2018 |
| DOIs | |
| Publication status | Published - 7 Jan 2019 |
ASJC Scopus subject areas
- Chemistry(all)
Cite this
New rhenium-tricarbonyl complexes bearing halogen-substituted bidentate ligands: Structural, computational and Hirshfeld surfaces studies. / Kia, Reza; Mahmoudi, Soheil; Raithby, Paul.
In: CrystEngComm, Vol. 21, No. 1, 07.01.2019, p. 77-93.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - New rhenium-tricarbonyl complexes bearing halogen-substituted bidentate ligands: Structural, computational and Hirshfeld surfaces studies
AU - Kia, Reza
AU - Mahmoudi, Soheil
AU - Raithby, Paul
PY - 2019/1/7
Y1 - 2019/1/7
N2 - A series of ten rhenium tricarbonyl complexes (C1-C10), bearing halogen-substituted bidentate N,N-donor ligands with halogens or trifluoromethyl groups (X = -F, -Cl, -Br, and -CF 3) in different positions on the aromatic rings were synthesized and characterized by FT-IR and 1H-NMR spectroscopy and their solid-state structures were determined by single crystal X-ray diffraction. The resultant complexes Re(CO) 3(N,N)X display an octahedral coordination geometry around the central Re atom, and in all the complexes the Re(CO) 3 unit adopts a fac geometry. The metal-bound halogen atoms along with the halogen-substituted ligands were used to fine-tune the electron density of the halogen σ-hole on the coordinated halide that is involved in halogen-halogen and other intermolecular interactions. This series of compounds was used to explore the range of possible intermolecular interactions involving rhenium coordinated halides. These supramolecular interactions include: (i) halogen bonding through the metal-bound halogen with the carbon-bound halogen (Re-X⋯X-C), (ii) halogen bonding through the carbon-bound halogen with another carbon-bound halogen (C-X⋯X-C), (iii) dipolar interactions through carbonyl-carbonyl (CO⋯CO), (iv) C-H⋯X hydrogen bonding interactions, (v) C-H⋯O hydrogen bonding interactions, (vi) halogen (X)⋯heteroatom (N, O) interactions and (vii) metal-bond carbonyl lone pair with aromatic π-ring interaction, Re-CO(lone pair)⋯π(aromatic ring). In each case the molecular electrostatic potential and non-covalent interaction index were calculated. Crystal packing analyses using Hirshfeld surface calculation confirmed that metal-bound halogen is more effective than carbon-bound halogen in the formation of intermolecular interactions. Complexes C8 and C10 featured interesting intramolecular Re-CO(lone pair)⋯π interactions, the presence of which were confirmed by molecular orbital and non-covalent interaction index (NCI) calculations.
AB - A series of ten rhenium tricarbonyl complexes (C1-C10), bearing halogen-substituted bidentate N,N-donor ligands with halogens or trifluoromethyl groups (X = -F, -Cl, -Br, and -CF 3) in different positions on the aromatic rings were synthesized and characterized by FT-IR and 1H-NMR spectroscopy and their solid-state structures were determined by single crystal X-ray diffraction. The resultant complexes Re(CO) 3(N,N)X display an octahedral coordination geometry around the central Re atom, and in all the complexes the Re(CO) 3 unit adopts a fac geometry. The metal-bound halogen atoms along with the halogen-substituted ligands were used to fine-tune the electron density of the halogen σ-hole on the coordinated halide that is involved in halogen-halogen and other intermolecular interactions. This series of compounds was used to explore the range of possible intermolecular interactions involving rhenium coordinated halides. These supramolecular interactions include: (i) halogen bonding through the metal-bound halogen with the carbon-bound halogen (Re-X⋯X-C), (ii) halogen bonding through the carbon-bound halogen with another carbon-bound halogen (C-X⋯X-C), (iii) dipolar interactions through carbonyl-carbonyl (CO⋯CO), (iv) C-H⋯X hydrogen bonding interactions, (v) C-H⋯O hydrogen bonding interactions, (vi) halogen (X)⋯heteroatom (N, O) interactions and (vii) metal-bond carbonyl lone pair with aromatic π-ring interaction, Re-CO(lone pair)⋯π(aromatic ring). In each case the molecular electrostatic potential and non-covalent interaction index were calculated. Crystal packing analyses using Hirshfeld surface calculation confirmed that metal-bound halogen is more effective than carbon-bound halogen in the formation of intermolecular interactions. Complexes C8 and C10 featured interesting intramolecular Re-CO(lone pair)⋯π interactions, the presence of which were confirmed by molecular orbital and non-covalent interaction index (NCI) calculations.
UR - http://www.scopus.com/inward/record.url?scp=85058899736&partnerID=8YFLogxK
U2 - 10.1039/C8CE01860J
DO - 10.1039/C8CE01860J
M3 - Article
VL - 21
SP - 77
EP - 93
JO - CrystEngComm
JF - CrystEngComm
SN - 1466-8033
IS - 1
ER -