암을 일으킬 것으로 의심됨 (노출되어도 암을 일으키지 않는다는 결정적인 증거가 있는 노출경로가 있다면 노출경로 기재)
발암성 물질
구분 2
경고
P201, P202, P281, P308+P313, P405,P501
예방조치문구:
P210
열·스파크·화염·고열로부터 멀리하시오 - 금연 하시오.
P262
눈, 피부, 의복에 묻지 않도록 하시오.
P304+P340
흡입하면 신선한 공기가 있는 곳으로 옮기고 호흡하기 쉬운 자세로 안정을 취하시오.
P309
노출되었거나 몸이 편치 않은 경우
P310
즉시 의료기관(의사)의 진찰을 받으시오.
삼켰다면 즉시 의료기관(의사)의 도움을 받으시오.
NFPA 704
2
3
0
트리-μ-카르보닐노나크르보닐테트라코발 C화학적 특성, 용도, 생산
화학적 성질
black crystal(s); air sensitive [DOU83] [STR93]
제조 방법
Tetracobalt dodecacarbonyl is most conveniently prepared by thermal decomposition
of the octacarbonyl at 50° in an inert atmosphere :
2Co2(CO)8 → Co4(CO)12+4CO
at present it cannot be prepared direct from cobalt(II) salts and carbon monoxide. Treatment of Co4(CO)12 with alkali metals in tetrahydrofuran gives the green-yellow [Co6(CO)15]2-
ion which is slowly transformed into the red-brown [Co6(CO)14]4- anion; these ions are
oxidized in aqueous solution by iron(III) chloride to a mixture of carbonyls from which
the black Co6(CO)16 can be extracted.
Structure and conformation
It consists of a tetrahedron of cobalt atoms ; three of these have two terminal CO groups and are bridged by CO groups, the other cobalt atom is bonded to three terminal CO groups and the other three cobalt atoms only. The infrared spectrum is considerably simpler than would be expected theoretically for such a structure and consequently a different structure has been proposed for Co4(CO)12 in solution. The carbonyl CO6(CO)16 has a similar infrared spectrum to, and is isomorphous with, Rh6(CO)16 so that it probably has the same structure.
