Expanding the 2,2′-bipyrimidine bridged 1D homonuclear coordination polymers family: [MII(bpym)Cl2] (M = Fe, Co) magnetic and structural characterization

Abstract

We report the synthesis, structural characterization, and magnetic properties of two new members MvFe(II), Co(II) of the [M(bpym)Cl 2 ] n 1D coordination polymers family.Please check this proof carefully. Our staff will not read it in detail after you have returned it.Translation errors between word-processor files and typesetting systems can occur so the whole proof needs to be read. Please pay particular attention to: tabulated material; equations; numerical data; figures and graphics; and references. If you have not already indicated the corresponding author(s) please mark their name(s) with an asterisk. Please e-mail a list of corrections or the PDF with electronic notes attached -do not change the text within the PDF file or send a revised manuscript. Corrections at this stage should be minor and not involve extensive changes. All corrections must be sent at the same time.Please bear in mind that minor layout improvements, e.g. in line breaking, table widths and graphic placement, are routinely applied to the final version.We will publish articles on the web as soon as possible after receiving your corrections; no late corrections will be made.Please return your final corrections, where possible within 48 hours of receipt, by e-mail to: dalton@rsc.orgQueries for the attention of the authors Dalton Transactions compound can be well understood as a uniform S = 2 chain with an antiferromagnetic exchange interaction between metal ion sites. In the case of the Co(II) ion, also an antiferromagnetic interaction is operative along the uniform chain, while at low temperatures a long range-ordering is observed due to spin canting originating from the anisotropic behaviour of the Co(II) lowest energy Kramers doublets.

Paramagnetic One-Dimensional Chain Complex Consisting of Three Kinds of Metallic Species Showing Magnetic Interaction through Metal–Metal Bonds

“…Plots of J values are shown in Figure against Co---Co distances found in several 1-D compounds (Table S2) in which high-spin Co­(+2) ions are bridged by organic molecules ,,− or second metals. ,, Although the trend that the strength of the interaction is weaker as the Co---Co distance is longer is found, the relationship between the J values and distances is not linear, and not clear. The strongest magnetic interactions are observed in [Co 2 PdCl 2 (dpa) 4 ] (dpa = bis­(2-pyridyl)­amide), where Co ions are bridged by a Pd ion to be Co–Pd–Co with a separation of 5.0 Å.…”

“…Comparison of J values (cm –1 ) against distances (Å) of Co---Co in reported 1-D compounds. ,,,,,− Open and filled circles are corresponding to that linkers of Co ions are organic molecules or second metals, respectively. Numbers beside circles are reference numbers.…”

Dimerization of Paramagnetic Trinuclear Complexes by Coordination Geometry Changes Showing Mixed Valency and Significant Antiferromagnetic Coupling through −Pt···Pt– Bonds

“…Figure shows the plots of the 2 J values against the M---M distances found in several 1D compounds in which high-spin Mn­(+2) ions (Table S2), ,− Co­(+2) ions (Table S3), ,,,− and Ni­(+2) ions (Table S4) ,,− are bridged by organic molecules or second metals. As a general trend, the strength of the interaction becomes weaker as the M---M distance becomes longer.…”

Structural, Spectroscopic Characterization and Application of a Co(II) Coordination Polymer [Co(suc)(bpm)] ⋅ 2H2O

“…A fitting of the Curie-Weiss law on the data gave Curie Constant (C) = 1.803 cm 3 mol À 1 K obtained from inverse of the slope and a negative Weiss constant (φ) = À 30.163 K, suggesting weak antiferromagnetic (AF) exchange interactions, evinced from declining χ M T values upon cooling with an effective magnetic moment of 3.8 BM using μ eff = (8 C) 1/2 . [1,3,18,21,22,[26][27][28][29]32,33]…”