Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interplay of Magnetic Exchange Interactions and Ni-S-Ni Bond Angles in
  Polynuclear Nickel(II) Complexes   The ability of bridging thiophenolate groups to transmit magnetic exchange
interactions between paramagnetic Ni(II) ions has been examined. For this
purpose, dinuclear and trinuclear Ni(II)-complexes were prepared and fully
characterized by IR- and UV-vis spectroscopy, X-ray crystallography, static
magnetization measurements and high-field electron spin resonance (HF-ESR). We
compare structural and magnetic properties of the two Ni(II)-complexes and
discuss the relationships between magnetic interactions and chemical bonding.

11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph