Synthesis and Crystal Structures of Group 10 Metal Bis(dithiolate) Complexes Constructed by 2,3-Naphtho-15-Crown-5 or 2,3-Naphtho-18-Crown-6 |
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Authors: | Xi-ke gao Jian-min dou Da-cheng li Feng-ying dong Da-qi wang |
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Institution: | (1) Department of Chemistry, Liaocheng University, Liaocheng, 252059, P.R. China |
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Abstract: | Five novel 2,3-naphtho crown ether group 10 metal bis(dithiolate) complexes, Na(N15C5)2]2Pd(mnt)2] (1), Na(N15C5)]2Pd(i-mnt)2] (2) and K(N18C6)]2M(i-mnt)2] (3
5) (where mnt = 1,2-dicyanoethylene-1,2-dithiolate, i-mnt = 1,1-dicyanoethylene-2,2-dithiolate and M = Ni, Pd, Pt for complexes
3–5, respectively), have been synthesized and characterized by elemental analysis, FT-IR, UV–Visible spectra and single crystal
X-ray diffraction. X-ray diffraction analyses reveal that complexes 1 and 2 have different structural features while complexes 3–5 are structurally isomorphous. Complex 1 consists of two Na(N15C5)2]+ sandwich complex cations and one Pd(mnt)2]2− anion, affording a zero-dimensional structure. For 2, the Na(N15C5)]+ mono-capped complex cations act as the bridges linking the Pd(i-mnt)2]2− anions into a 1D infinite chain through Na–N interactions and SȮFC and SȮFπ interactions are observed in the resulting chain.
Complexes 3–5 all consist of two K(N18C6)]+ complex cations and one M(i-mnt)2]2− (M = Ni, Pd or Pt) anion and the complex molecules are linked into␣1D␣chains by the bridging K–O(ether) interactions between
the adjacent K(N18C6)]+ units. What’s novel is that the resulting chains are assembled into novel 2D networks through interchain π–π stacking interactions
between the neighboring naphthylene moieties of N18C6. The stack model of naphthylene group in complexes 3–5 is discussed. |
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Keywords: | group 10 metal bis(dithiolate) complexes 2 3-naphtho-15-crown-5 (N15C5) 2 3-naphtho-18-crown-6 (N18C6) synthesis and crystal structure |
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