Topic
Tetrahedral molecular geometry
About: Tetrahedral molecular geometry is a research topic. Over the lifetime, 1795 publications have been published within this topic receiving 30706 citations.
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TL;DR: In this paper, the pendant arms of the disubstituted bispidine (3,7-diazabicyclo[3.3.1]nonane) backbone need to form six-membered chelate rings with the metal to allow a distorted tetrahedral geometry.
Abstract: Molecular mechanics calculations were used to compute the structural
properties of a new type of very rigid tetradentate ligand for tetrahedral
co-ordination geometries. The calculations indicate that the pendant arms
of the disubstituted bispidine (3,7-diazabicyclo[3.3.1]nonane) backbone
need to form six-membered chelate rings with the metal to allow a distorted
tetrahedral geometry. Smaller rings lead to five- (trigonal bipyramidal) or
six-co-ordinate (octahedral) transition-metal compounds. The quality of
these predictions is supported by the experimentally determined structure
of a cobalt(II) compound of the ligand with co-ordinated
pyridine substituents (five-membered chelate rings) and an additional
bidentate nitrate ligand. Comparison of the computed structures with the
crystal structure of the cobalt(II) compound and with that of a
ligand with methyl-protected phenyl substituents supports the rigidity of
the bispidine backbone and indicates that rotation of co-ordinating side
chains around a C–C single bond is the only flexibility in these
ligands.
58 citations
TL;DR: In this paper, 13 tris(2-methyl-2-phenylpropyl)tin germylpropionates have been synthesized and their structures characterized by elemental analysis, IR, multinuclear NMR (1 H, 13 C, 119 Sn) and MS spectroscopies.
58 citations
TL;DR: In this article, two Schiff bases, N-(1-pyridin-2-ylformylidene)-N′-[2-({2]-(1-polygonal polygonal diagrams)amino]ethyl amino)ethyl]ethane-1,2-diamine (L1) and N-( 1-polycyclic polycyclic deagrams-amino) methyl methylamine (L2) have been prepared and used to synthesize two series of zinc(II) pseudohalide complexes of the din
58 citations
TL;DR: A unique bonding of indole to a metal ion has been established using two new tridentate N ligands with a pendent indole ring that exhibits the new form of bonding between the Cu(I) ion in a distorted tetrahedral geometry and the indole C(2)-C(3) moiety.
Abstract: A unique bonding of indole to a metal ion has been established. Two new tridentate N ligands with a pendent indole ring gave Cu(I) complexes 1 and 2, the latter of which exhibits the new form of bonding between the Cu(I) ion in a distorted tetrahedral geometry and the indole C(2)-C(3) moiety. The bond is dependent upon the length of the side chain and therefore the accessibility of the ring to the metal center.
58 citations
TL;DR: In this paper, three coordination polymers, [Cd3(BTC)2(m-bix)3]n·4nH2O (1), {[Cd(HBTC)(H 2O)]·(p-Bix)1/2(H 2 O)2}n (2) and [Zn3(Zn(II) ions, one is in tetrahedral geometry and the other is in ideal octahedral environment], have been synthesized under hydrothermal conditions and structurally characterized.
57 citations