Five-coordination. V. Trigonal-bipyramidal nickel(II) compleses oftris(3-dimethylarsinopropyl)arsine

Reaction between the tetrachloropalladate(II) ion and 1,10-phenanthroline

“…'~~~~ The more complicated set of equilibria occurring for palladium precludes a unique solution for the rate constants involved. l8 The dichlorodiammines seem (17) Rund and F. A. Palocsay, Inovg. A more detailed argument for this point of view has been published elsewhere.…”

Tetraphenylethylene. Infrared and nuclear magnetic resonance evidence on the nature of the dianion

“…Among these, iranj-stilbene and tetraphenylethylene have no observed C=C stretching in the infrared owing to symmetry taboos (likewise, tetracyanoethylene (TCNE), though it is not aryl).11 One set of characteristic frequencies of aryl skeletal vibrations of unreduced species appears near 1600 cm-1. Upon reduction to the anion radical or ketyl this frequency range of all these compounds is lowered,8 as expected, since additional electron density in the aryl ring would be expected to "loosen" the (10) N. B. Colthup, L. H. Daly, and S. E. Wiberly, "Introduction to Infrared and Raman Spectroscopy," Academic Press, New York, N. Y., 1964, pp 220-224. Colthup envisions the two components of the 1600-cm-1 skeletal vibration region of benzene rings as "opposite quadrants of the ring stretching while the intervening quadrants contract."…”

Synthesis, properties, and x-ray characterization of aquo and hydroxo complexes of cobalt(II) and nickel(II) with poly(tertiary phosphines)

“…1 (1) P(l) 35 (1) 49 (2) 50 ( 2) 14 (1) 3 (1) 4 (1) P( 2) 34 (1) 40 ( 2) 45 ( 2) 16 (1) -3 (1) 2 (1) P(3) 33 (1) 36 (2) 63 ( 2) 13 (1) -3 (1) 2 (1) P( 4) 42 ( 2) 57 ( 2) 45 ( 2) 19 (1) 1 (1) -5 (1) F(l) 118 ( 8) 81 ( 7) 223 ( 13) 18 (6) -60 (8) 32 (7) F( 2) 152 ( 12) 177 ( 13) 462 ( 25) 115 (12) 153 ( 16) 227 ( 16) F( 3) 413 (28) 392 ( 26) 317 ( 26) 312 ( 24) 277 ( 24) 168 (21) F( 4) 406 ( 27) 153 ( 13) 253 (19) -86 (15) -244 (20) 32 ( 13) 0(1) 31 (3) 37 (3) 35 (4) 11 (3)…”