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MEASURING HETEROGENEITY IN PREGNANCY FRAMES Calculating neighborhood heterogeneity in pregnancy frames is complicated by the ordinal nature of the pregnancy frame measure, which makes the usual measure of variation for interval measures, the variance, inappropriate. I use an ordinal variation measure developed by Blair and Lacy (2000) that measures… (More)
The first Fe(III) qsal-X complex exhibiting abrupt complete spin crossover at 228 K with a hysteresis of 8 K, [Fe(qsal-I)2]OTf is reported. Structural studies of the MeOH solvate in the LS and HS state and at the spin transition are described.
[Fe(qsal-Br)2]NO3·2MeOH is reported which undergoes abrupt two step symmetry breaking spin crossover, T½(1st step) = 136 K and T½(2nd step) = 232 K with a hysteresis of 16 K and 5 K, respectively, and an unprecedented [HS-LS] plateau of 96 K.
The reaction of cobalt(II) acetate with potassium tris(pyrazolyl)borate (KTp(Ph2)) affords the title complex, [Co(Tp(Ph2))(O2CMe)(Hpz(Ph2))] (Hpz(Ph2) is 3,5-diphenylpyrazole) or [Co(C45H34BN6)(C2H3O2)(C15H12N2)], as a result of cobalt-induced B-N bond cleavage of the tris(pyrazolyl)borate ligand. The cobalt complex exhibits a distorted CoN(4)O coordination… (More)
In the title complex, [Co(C(5)HF(6)O(2))(2)(C(12)H(9)BrN(2))], the Co(II) atom exhibits a pseudo-octa-hedral coordination geometry, comprising two N-donor atoms from a bidentate chelate (4-bromo-phen-yl)(2-pyridyl-methyl-idene)amine (ppa(Br)) ligand [Co-N = 2.098 (2) and 2.209 (2) Å] and four O-donor atoms from two bidentate chelate… (More)
The reaction of bis(1,3-diphenylpropane-1,3-dionato)cobalt(II), [Co(dbm)(2)], with bis(diphenylphosphino)ethane (dppe) affords the coordination polymer catena-poly[[bis(1,3-diphenylpropane-1,3-dionato-kappa(2)O,O')cobalt(II)]-mu-ethylenebis(diphenylphosphine oxide)-kappa(2)O:O'], trans-[Co(C(15)H(11)O(2))(2)(C(26)H(24)O(2)P(2))](n), as a result of oxidation… (More)
Solvent effects in a series of Fe(iii) spin crossover (SCO) complexes [Fe(qsal-I)2]OTf·sol (sol = MeOH 1, EtOH 2, n-PrOH 3, i-PrOH 4, acetone 5 and MeCN 6) are explored. SCO is abrupt in 1 (following MeOH loss) and 2, gradual for 3 (T1/2 = 199 K) and 4 (T1/2 = 251 K) and incomplete, even up to 350 K, for 5 and 6. In [Fe(qsal-I)2]OTf SCO occurs at T1/2↓ =… (More)
In the title compound, [Mn(NO(3))(2)(C(12)H(8)N(2))(2)], the Mn(II) atom lies on a twofold rotation axis, and is six-coordinated in a distorted trans-N(4)O(2) octa-hedral environment by four N atoms from two 1,10-phenanthroline ligands and two O atoms from two nitrate anions. The nitrate anion is disordered about a twofold rotation axis with fixed occupancy… (More)
A series of new cobalt(II) and nickel(II) tris(3,5-diphenylpyrazolyl)borate (Tp(Ph2)) dithiocarbamate complexes [Tp(Ph2)M(dtc)] (M = Co, dtc = S₂CNEt₂ 1, S₂CNBz₂ 2 and S₂CN(CH₂)₄ 3; M = Ni, dtc = S₂CNEt₂ 4, S₂CNBz₂ 5 and S₂CN(CH₂)₄ 6) have been prepared by the reaction of [Tp(Ph2)MBr] with Nadtc in CH₂Cl₂. IR spectroscopy indicates that the Tp(Ph2) ligand… (More)
A new synthesis of (8-quinolyl)-5-methoxysalicylaldimine (Hqsal-5-OMe) is reported and its crystal structure is presented. Two Fe(III) complexes, [Fe(qsal-5-OMe)(2)]Cl⋅solvent (solvent = 2 MeOH⋅0.5 H(2)O (1) and MeCN⋅H(2)O (2)) have been prepared and their structural, electronic and magnetic properties studied. [Fe(qsal-5-OMe)(2)]Cl⋅2 MeOH⋅0.5 H(2)O (1)… (More)