Crystal-field calculations with trigonal bipyramidal symmetry potential. 1. Weak crystal field for d3,7 configurations

1976 ◽  
Vol 80 (12) ◽  
pp. 1373-1376 ◽  
Author(s):  
F. Gomez Beltran ◽  
F. Palacio
Keyword(s):  
Crystal Field ◽  
Symmetry Potential ◽  
Trigonal Bipyramidal

Crystal field-spin orbit perturbation calculations in d2 and d8 trigonal bipyramidal complexes

1970 ◽  
Vol 74 (7) ◽  
pp. 1568-1585 ◽  
Author(s):  
Clifford A. L. Becker ◽  
Devon W. Meek ◽  
Thomas M. Dunn
Keyword(s):  
Crystal Field ◽  
Spin Orbit ◽  
Trigonal Bipyramidal ◽  
Orbit Perturbation

scholarly journals Zn and Ni complexes of pyridine-2,6-dicarboxylates: crystal field stabilization matters!

2019 ◽  
Vol 75 (6) ◽  
pp. 903-911
Author(s):  
Marius Kremer ◽  
Ulli Englert
Keyword(s):  
Transition Metal ◽  
Dicarboxylic Acid ◽  
Crystal Field ◽  
Coordination Polymers ◽  
Two Dimensional ◽  
Reaction Products ◽  
Coordination Polyhedra ◽  
Trigonal Bipyramidal ◽  
Regular Shape ◽  
Coordination Spheres

Six reaction products of ZnII and NiII with pyridine-2,6-dicarboxylic acid (H2Lig1), 4-chloropyridine-2,6-dicarboxylic acid (H2Lig2) and 4-hydroxypyridine-2,6-dicarboxylic acid (H2Lig3) are used to pinpoint the structural consequences of crystal field stabilization by an incomplete d shell. The pseudo-octahedral ZnII coordination sphere in bis(6-carboxypicolinato)zinc(II) trihydrate, [Zn(C7H4NO4)2]·3H2O or [Zn(HLig1)2]·3H2O, (1), is significantly less regular than that about NiII in the isostructural compound bis(6-carboxypicolinato)nickel(II) trihydrate, [Ni(C7H4NO4)2]·3H2O or [Ni(HLig1)2]·3H2O, (2). The ZnII complexes poly[(4-chloropyridine-2,6-dicarboxylato)zinc(II)], [Zn(C7H2ClNO4)] n or [Zn(Lig2)] n , (3), and poly[[(4-hydroxypyridine-2,6-dicarboxylato)zinc(II)] monohydrate], {[Zn(C7H3NO5)]·H2O} n or {[Zn(Lig3)]·H2O} n , (4), represent two-dimensional coordination polymers with chelating and bridging pyridine-2,6-dicarboxylate ligands in which the coordination polyhedra about the central cations cannot be associated with any regular shape; their coordination environments range between trigonal–bipyramidal and square-pyramidal geometries. In contrast, the corresponding adducts of the diprotonated ligands to NiII, namely triaqua(4-chloropyridine-2,6-dicarboxylato)nickel(II), [Ni(C7H2ClNO4)(H2O)3] or [NiLig2(OH2)3)], (5), and triaqua(4-hydroxypyridine-2,6-dicarboxylato)nickel(II) 1.7-hydrate, [Ni(C7H3NO5)(H2O)3]·1.7H2O or [NiLig3(OH2)3)]·1.7H2O, (6), feature rather regular octahedral coordination spheres about the transition-metal cations, thus precluding the formation of analogous extended structures.

More crystal field theory in action: the metal–4-picoline (pic)–sulfate [M(pic) x ]SO4 complexes (M = Fe, Co, Ni, Cu, Zn, and Cd)

2019 ◽  
Vol 75 (5) ◽  
pp. 568-574 ◽  
Author(s):  
Duyen N. K. Pham ◽  
Mrittika Roy ◽  
Ava Kreider-Mueller ◽  
James A. Golen ◽  
David R. Manke
Keyword(s):  
Crystal Structure ◽  
Field Theory ◽  
Crystal Structures ◽  
Crystal Field ◽  
Crystal Field Theory ◽  
Iron Cobalt ◽  
Coordination Environment ◽  
Trigonal Bipyramidal ◽  
Cobalt Nickel ◽  
Sulfate Complexes

Seven crystal structures of five first-row (Fe, Co, Ni, Cu, and Zn) and one second-row (Cd) transition metal–4-picoline (pic)–sulfate complexes of the form [M(pic) x ]SO4 are reported. These complexes are catena-poly[[tetrakis(4-methylpyridine-κN)metal(II)]-μ-sulfato-κ2 O:O′], [M(SO4)(C6H7N)4] n , where the metal/M is iron, cobalt, nickel, and cadmium, di-μ-sulfato-κ4 O:O-bis[tris(4-methylpyridine-κN)copper(II)], [Cu2(SO4)2(C6H7N)6], catena-poly[[bis(4-methylpyridine-κN)zinc(II)]-μ-sulfato-κ2 O:O′], [Zn(SO4)(C6H7N)2] n , and catena-poly[[tris(4-methylpyridine-κN)zinc(II)]-μ-sulfato-κ2 O:O′], [Zn(SO4)(C6H7N)3] n . The Fe, Co, Ni, and Cd compounds are isomorphous, displaying polymeric crystal structures with infinite chains of M II ions adopting an octahedral N4O2 coordination environment that involves four picoline ligands and two bridging sulfate anions. The Cu compound features a dimeric crystal structure, with the CuII ions possessing square-pyramidal N3O2 coordination environments that contain three picoline ligands and two bridging sulfate anions. Zinc crystallizes in two forms, one exhibiting a polymeric crystal structure with infinite chains of ZnII ions adopting a tetrahedral N2O2 coordination containing two picoline ligands and two bridging sulfate anions, and the other exhibiting a polymeric crystal structure with infinite chains of ZnII ions adopting a trigonal bipyramidal N3O2 coordination containing three picoline ligands and two bridging sulfate anions. The structures are compared with the analogous pyridine complexes, and the observed coordination environments are examined in relation to crystal field theory.

Crystal field-spin orbit treatment in d1 and d9 trigonal bipyramidal complexes

1968 ◽  
Vol 72 (10) ◽  
pp. 3588-3598 ◽  
Author(s):  
Clifford A. L. Becker ◽  
Devon W. Meek ◽  
T. M. Dunn
Keyword(s):  
Crystal Field ◽  
Spin Orbit ◽  
Trigonal Bipyramidal

LOW SYMMETRY CRYSTAL FIELD IN LITHIUM SPINEL

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-847-C1-849
Author(s):  
M. P. PIETROV ◽  
H. SZYMCZAK ◽  
R. WADAS ◽  
W. WARDZYNSKI
Keyword(s):  
Crystal Field ◽  
Low Symmetry

Determination of exchange and crystal field effects in Sm alloys by polarized neutron diffraction

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-180-C5-182 ◽  
Author(s):  
J. X. Boucherle ◽  
D. Givord ◽  
J. Laforest ◽  
J. Schweizer ◽  
F. Tasset
Keyword(s):  
Neutron Diffraction ◽  
Crystal Field ◽  
Field Effects ◽  
Polarized Neutron
Sign in / Sign up

Export Citation Format

Share Document