
TY  - JOUR
A1  - Whittall, Ian R. 
A1  - Humphrey, Mark G. 
A1  - Hockless, David C. R. 
T1  - Structural Systematics of Metal Acetylide Complexes. II.  X-Ray Studies of Some Nickel &#963;-Acetylide Complexes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1998
VL  - 51
IS  - 3
SP  - 219
EP  - 228
KW  - 
UR  - https://doi.org/10.1071/C97082 
N2  - The structures of Ni(C&#8801;CR)(PPh3)(&#951;-C5H5) (R = Ph (1), C6H4-4-NO2 (2), 4-C6H4C6H4-4&#8242;-NO2 (3), (E)-4-C6H4CH=CHC6H4-4&#8242;-NO2 (4), 4-C6H4C&#8801;CC6H4-4&#8242;-NO2 (5), 4-C6H4N=CHC6H4-4&#8242;-NO2 (6)) have been determined by single-crystal X-ray diffraction studies, refining by full-matrix least-squares analysis. For (1), crystals are triclinic, space group P-1, with a 10&#183;094(2), b13&#183;429(3), c 18&#183;835(5) &#197;,&#945; 103&#183;24(2), &#946; 91&#183;50(2), &#947; 90&#183;10(2)&#176;, Z 4, 5844 unique reflections (595 parameters), converging at R 0&#183;033 and Rw 0&#183;024. For (2), crystals are orthorhombic, space group Pna21, with a 16&#183;799(2), b 8&#183;681(2), c 17&#183;485(2) &#197;, Z 4, 1774 unique reflections (325 parameters), converging at R 0&#183;031 and Rw 0&#183;029. For (3), crystals are monoclinic, space group P 21/c, with a 11&#183;140(3), b 18&#183;282(4), c 15&#183;296(2) &#197;, &#946; 105&#183;18(2)&#176;, Z 4, 3132 unique reflections (397 parameters), converging at R 0&#183;039 and Rw 0&#183;024. For (4), crystals are monoclinic, space group P 21/n, with a 12&#183;929(7), b 16&#183;953(8), c 15&#183;601(7) &#197;, &#946; 112&#183;55(3), Z 4, 3023 unique reflections (397 parameters), converging at R 0&#183;039 and Rw 0&#183;025. For (5), crystals are monoclinic, space group P 21/n, with a 12&#183;710(5), b 16&#183;882(3), c 15&#183;693(4) &#197;, &#946; 111&#183;37(3)&#176;, Z 4, 3216 unique reflections (397 parameters), converging at R 0&#183;035 and Rw 0&#183;030. For (6), crystals are monoclinic, space group P 21/n, with a 12&#183;594(1), b 16&#183;936(2), c 15&#183;611(1) &#197;, &#946; 112&#183;476(5)&#176;, Z 4, 3564 unique reflections (397 parameters), converging at R 0&#183;038 and Rw 0&#183;041. For structurally characterized 18-electron (cyclopentadienyl)nickel(II) acetylide complexes, statistically insignificant decreases in the average Ni-C(1) distance and trans influence and an increase in the average C(1)-C(2) parameter are observed on introduction of an acceptor substituent at the alkynyl ligand. 
ER  -

