Directed Selenium–Iodine Halogen Bonding and Se···H–C Contacts in Solid Iododiisopropylphosphane Selenide

Solid iododiisopropylphosphane selenide crystallizes
in the space
group P21/n with one
molecule iPr2P­(I)Se in the asymmetric
unit. Halogen bonds of the type Se···I–P (Se···I,
3.612 Å; Se···I–P, 171°) connect the
molecules to form polymeric chains (-Se···I–P-)x. These are further connected by Se···H
contacts (2.98 Å) involving the tertiary H atom from one isopropyl
group. The extended structure thus formed is a layer parallel to 101̅,
and a substructure thereof consists of 10-membered (···Se···I–P–C–H···)2 rings.

固态二异丙基碘代膦硒化物（iododiisopropylphosphane selenide）于空间群（space group）P2₁/n中结晶，其不对称单元（asymmetric unit）内包含1个iPr₂P(I)=Se分子。该体系中存在Se···I–P型卤键（Halogen bonds），其中Se···I作用距离为3.612 Å，Se···I–P键角为171°，此类卤键可将分子连接形成聚合物链（polymeric chains）(-Se···I–P-)ₓ。此类聚合物链进一步通过Se···H接触作用相连，该作用涉及一个异丙基（isopropyl group）上的叔氢原子（tertiary H atom），作用距离为2.98 Å。由此形成的延展结构（extended structure）为平行于(101̅)晶面的层状结构，其子结构包含由(···Se···I–P–C–H···)₂构成的10元环。