The synthesis of a novel heterobimetallic amidotungsten–antimony complex

Choujaa, Hamid; Johnson, Andrew L.; Kociok‐Köhn, Gabriele; Molloy, Kieran C.

doi:10.1016/j.poly.2010.01.033

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…There are only scant findings of closely related interactions within crystals that might serve as a basis of comparison. Among those pairing SbCl 3 with a N-base, 70,71 the most closely connected to the computations described above places the N of aniline 72 within 2.53 Å of Sb, fairly close to the 2.69 Å distance calculated here for the NH 3 base. Further, the θ(ClSb••N) angle in the X-ray structure is nearly precisely equal to the 165°o btained from the geometry optimization.…”

Section: 1supporting

confidence: 82%

Transition between the Noncovalency and Covalency of σ–Hole Bonds

Scheiner

2023

J. Phys. Chem. A

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The properties of the bond between a N-ligand and a Lewis acid containing a σ−hole are studied by quantum chemical methods. Interactions considered include pnicogen bonds involving SbX 5 , PX 5 , and PX 3 , where X represents any of the halogen atoms F, Cl, Br, or I. Also studied are the tetrel bonds of PbX 4 and SiX 4 , as well as the chalcogen bond involving TeOX 4 . Both NH 3 and NCH are applied as two possible bases of differing potency. Some of the bonds are very strong with interaction energies easily exceeding 25 kcal/mol and with AIM bond critical point densities much higher than 0.04 au, suggesting their classification as coordinate covalent bonds. The pentavalent SbX 5 and PX 5 fall into this category when combined with NH 3 , as does TeOX 4 . Although the tetrel bonds involving PbX 4 are only slightly weaker, they are probably better viewed as a strong noncovalent bond on the cusp of covalency. Changing the internal bonding of hypervalent SbX 5 to the more conventional SbX 3 weakens the interaction to a classical noncovalent pnicogen bond. Reducing the base nucleophilicity from NH 3 to NCH weakens the bonds so that they are clearly noncovalent.

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Section: 1supporting

confidence: 82%

Transition between the Noncovalency and Covalency of σ–Hole Bonds

Scheiner

2023

J. Phys. Chem. A

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Synthesis and Structural Determination of a Novel Heterometallic Complex [Sb₂(edta)₂‐µ₄‐Co(H₂O)₂]·5.15H₂O

Shen¹,

Jiang²,

Yu³

2011

Chin. J. Chem.

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The novel three-dimension edta-linked (edta＝ethylenediamine-N,N,N′,N′-tetraacetate) heterometallic complex [Sb 2 (edta) 2 -µ 4 -Co(H 2 O) 2 ]•5.15H 2 O has been synthesized and characterized by elemental analyses, FT-IR spectrum, X-ray diffraction analyses and thermogravimetry-differential scanning calorimetry (TG-DSC). The complex crystallizes in the monoclinic system, space group P2 1 /n, lattice parameters: a＝0.69969 (2) the Sb(III) ion is six coordinated by two nitrogen and four oxygen from edta ions, together with a lone electron pair at the equatorial position. In the complex, the coordination number of Co(II) ion is six and its coordination environment is composed of four carboxylic oxygen atoms from four different edta ions and two oxygen atoms from two H 2 O molecules. The degradation of the sample proceeds in several steps and the water molecules and ligands are successively emited.

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