Nickel(II) complexes having Imidazol-2-ylidene-N′-phenylurea ligand in the coordination sphere – syntheses and solid state structures

Journal of Chemical Sciences

Hari Pada Nayek2²  Kishor Naktode¹  Abhinanda Kundu¹  Tarun K Panda1¹  Sudeshna Saha² 

[1] Department of Chemistry, Indian Institute of Technology Hyderabad, Ordnance Factory Estate, Yeddumailaram 502 205, Telangana, India$$;Department of Applied Chemistry, Indian School of Mines, Dhanbad, 826 004, Jharkhand, India$$

关键词: Nickel(II);    imidazol-2-ylidene-N'-phenylurea;    hexa-coordination;    chelating ligands;    hydrogen bonding.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

We report the syntheses and structural studies of two nickel(II) complexes of imidazol-2-ylidene- N'-phenylureate ligand of composition [{Im𝑡Bu NCON(H)Ph}2 Ni(acac)2] (1) and [(C6H5NH2)2 Ni(acac)2] [ImMes NCON(H)Ph] (2). The nickel complex 1 was readily prepared by the reaction of nickel(II) acetylacetonate [Ni(acac) 2 ] with imidazol-2-ylidene-N'-phenylureate ligand [Im𝑡Bu NCON(H)Ph] (L1) in THF under reflux condition for 72 h. The nickel complex 2 was obtained by the reaction of [Ni(acac)2], mesityl derivative of imidazol-2-ylidene-N′-phenylureate ligand [ImMes NCON(H)Ph] (L2) in the presence of aniline as base under reflux condition in THF. Both the paramagnetic complexes have been characterized by FT-IR spectroscopy and elemental analyses. Solid-state structures of both the new complexes were established by single crystal X-ray diffraction analysis. In the molecular structures of complexes 1 and 2, each nickel(II) ion is six fold coordinated and form a distorted octahedral geometry. The optical properties of both complexes have been explored. The Hirshfeld surfaces are used to view and analyze the intermolecular contacts in crystalline state for complex 2.

【 授权许可】

Unknown