Email-запись: Crystal structures of (μ(2)-η(2),η(2)-4-hydroxybut-2-yn-1-yl 2-bromo-2-methylpropanoate-κ(4) C (2),C (3):C (2),C (3))bis[tricarbonylcobalt(II)](Co—Co) and [μ(2)-η(2),η(2)-but-2-yne-1,4-diyl bis(2-bromo-2-methyl­propanoate)-κ(4) C (2),C (3):C (2),C (3)]bis[tricarbonylcobalt(II)](Co—Co)