Ligands structural formulae

Coordina- tion Number Shape Ligand Structure/Formula Name of complex ion/neutral complex... 

Draw all the structural formulas for the octahedral complexes of Co3+ with only ox and/or NH3 as ligands. 

Strassmann, F., 17 strong acid, F74, 396 strong base, F74, 397 strong electrolyte, F6"7 strong force, 705 strong-field ligand, 683 strontium, 593 structural formula, F24 structural isomer, 675, 734... 

VII. Appendix Ligand Abbreviations, Formulae, and Structures References... 

When the ligand is placed or found inside the receptor pocket, then the free energy of binding of the molecular complex is estimated computationally. Therefore the 3D-coordinates of the atoms in the protein receptor, a structural formula of the ligand, with bond lengths and angles and in addition knowledge of the position of the active site are required. 

In order to apply this rule we had to transform the original three-dimensional structural formula in two stages (Fig. 5). In the first, the ligand model, the sequences of atoms constituting the ligands of an element of stereoisomerism... 

Figure 15.3 Structural formula of deoxyadenosylcobalamin (coenzyme B, ). (a) A plan view of the corrin nucleus with substituents, (b) The position of the remaining two ligands of the cobalt atom. No attempt is made to show correct stereochemical relationships. Related compounds have different groups in place of the 5 -deoxyadenosyl group cyanocobalamin, (vitamin Bi2)-CN hydroxycobalamin, (vitamin Bi2)-0H methylcobalamin, (vitamin Bi2)-CH3.

Figure 13.19 Structure formulas of cyclophane ligand 214+, catenane ligands 224+ and 234+, and mononuclear catenane complexes.

Figure 16.3 Structural formulae of the ligands L and emission colors of their L2Ir(acac) complexes in the Commission Internationale de l E clairage (CIE) coordinates. (See the color version of this figure in Color Plates section.)...

In our structural formulas, zinc with its three ligands could, without any fundamental difficulty, take the place of the aluminum with four ligands. In this connection, attention may be drawn to the technical ethyl acetate synthesis according to Tishchenko, in which the catalytically active aluminum may be replaced in part, or even wholly, by zinc. 

A structural formula of a ligand occupies the same place in a sequence as would its molecular formula... 

Table 64 Bidentate Ligands Cited in Section 50.5.4.4 Structures, Formulas and Abbreviations Used in Table 65...

The structural formulas of the ligands and their abbreviations are given in Table 64. D = diamagnetic. 

Many of the complexes which occur in spin equilibrium possess ligands with complicated structures. Trivial abbreviations are used, with structural formulas given in the table in which the complex first appears. Generally the complexes are of low symmetry, but in the description of their electronic structure idealized symmetries are assumed and the appropriate term symbols are used accordingly. 

Figure 6.28 Structural formulas of the DiPAMP, BINAP, and Xyliphos ligands.

Recently, structural evidence for the first quintuple bond between two metal atoms was found in the dichromium(I) complex Ar CrCrAt7 (where Ar is the sterically encumbering monovalent 2,6-bis[(2,6-diisopropyl)phenyl]phenyl ligand). This complex exists as air- and moisture-sensitive dark-red crystals that remain stable up to 200°C. X-ray diffraction revealed a centrosymmet-ric molecule with a planar trans-bent C-Cr-Cr-C backbone with measured structural parameters Cr-Cr 183.51(4) pm, Cr-C 213.1(1) pm, and C-Cr-Cr 102.78(3)°. Characterization of the compound is further substantiated by magnetic and spectroscopic data, as well as theoretical computations. Figure 19.2.6 shows the molecular geometry and structural formula of Ar CrCrAr. ... 

Structural formula of the H2bpyany ligand and molecular geometry of the hexanuclear monocation in crystalline [Co6( 6-bpyany)4Cl2]PF6. 

The structural formula of this new cytostatic (picoplatin) is shown below. In determining the stereo descriptor, the situation arises here that the highest ranking ligand occurs twice. In such cases the priority number of the ligand coordinated trans to it with the lowest priority (i.e. with the highest priority number) is used as the configuration index (principle of trans maximum difference). 

Medium fields with ALs < Ac/ Aei It is the relative energies that are important the multiplet splitting may vary from 10 l to 104 cm-1 (see Sommerfeld s (594) fine structure formula). In this case Fei is the first perturbation effect, and the cubic part of Vcf is treated as a perturbation before spin-orbit effects are calculated. For distortions from cubic symmetry, it is necessary to consider carefully the relative magnitudes of Vt (that part of VCf due to departures from cubic symmetry) and Vis S. Weak fields with ACf ls - In this case the ligand fields merely perturb the multiplet structure of the free atom. 

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