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The first phosphoramide–mercury(II) complex with a Cl 2 Hg–OP[N(C)(C)] 3 segment
Author(s) -
Saneei Anahid,
Pourayoubi Mehrdad,
Crochet Aurelien,
Fromm Katharina M.
Publication year - 2016
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229616002394
Subject(s) - chemistry , coordination number , mercury (programming language) , metal , crystallography , ion , valence (chemistry) , stereochemistry , molecule , coordination complex , lewis acids and bases , atomic orbital , electron , organic chemistry , physics , quantum mechanics , computer science , programming language , catalysis
Mercury(II) exhibits a strong preference for linear coordination which has been attributed to relativistic effects splitting the 6 p orbitals and promoting sp hybridization. If the two ligands attached to the mercury(II) ion are weak donors, the metal ion can act as a good Lewis acid and expand its coordination number. Moreover, mercury has a special affinity for softer bases, such as S and N atoms, and has much less affinity for hard bases, such as those including an O atom. The asymmetric unit of dichlorido[tris(piperidin‐1‐yl)phosphane oxide‐κ O ]mercury(II)–dichloridomercury(II) (2/1), [HgCl 2 {(C 5 H 10 N) 3 PO}] 2 ·[HgCl 2 ], is composed of one HgCl 2 {(C 5 H 10 N) 3 PO} complex and one half of a discrete HgCl 2 entity located on an inversion centre. The coordination environment around the Hg II centre in the complex component is a distorted T‐shape. Bond‐valence‐sum calculations confirm the three‐coordination mode of the Hg II atom of the complex molecule. The noncovalent nature of the Hg…Cl and Hg…O interactions in the structure are discussed.