In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 46, No. 2 ( 1991-2-1), p. 147-156
Abstract:
Dinitrogen bridged cobalt(I) hydride compounds (L 3 CoH) 2 N 2 (1: L = PMe 3 , 2: 3L = CH 3 C(CH 2 PMe 2 ) 3 have been synthesized by protonation of dinitrogen cobaltates. 1 crystallizes in the monoclinic space group C 2/m . a = 965, b = 1653, c = 1148 pm ,β = 106.88°, Z = 2. In solution 1 takes up N 2 reversibly forming CoH(N 2 )(PMe 3 ) 3 (1 a) . Infrared data including isotope labeling ( 15 N , 2 H) and assignment of vN = N and vCoH bands are presented. 1 reacts with aryl alkynes to give dialkynylcobalt(III) complexes CoH(C 2 ,R 1 )(C 2 ,R 2 )(PMe 3 ) 3 (5: R 1 = R 2 = C 6 H 5 ; 6 : R 1 = R 2 = 4 -CH 3 C 6 H 4 ; 7: R 1 = R 2 = 4-C lC 6 H 4; 8 : R 1 = C 6 H 5, R 2 = 4-ClC 6 H 4 ) that are also obtained in a more convenient synthesis involving cobalt(I) intermediates Co(C 2 R 1 )(PMe 3 ) 4 (10: R 1 = 4 -CH 3 C 6 H 4 , 11: R 1 = 4-ClC 6 H 4 ). Three metastable isomers of 5 have been characterized, the stable configuration is mer-trans as shown by a crystal structure determination: Space group P 2 1 , a = 933.5(5), b = 1636.7(6), c = 901.1(3) pm, β = 97.4(1)°, Z = 2.
Type of Medium:
Online Resource
ISSN:
1865-7117
,
0932-0776
DOI:
10.1515/znb-1991-0204
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
1991
detail.hit.zdb_id:
2078109-X
detail.hit.zdb_id:
124635-5
Bookmarklink