X-Ray Absorption Study of the High-Spin/Low-Spin Transition in [Fe(II)(bpp)2](BF4)2 R. Lübbers, G. Nowitzke, H. A. Goodwin and G. Wortmann J. Phys. IV France, 7 C2 (1997) C2-651-C2-652 DOI: 10.1051/jp4/1997132